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Journal articles on the topic 'Dorsal fin'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Meza-Vargas, Vanessa, Jorge L. Ramirez, and Nathan K. Lujan. "The ornate rubbernose pleco (Siluriformes, Loricariidae, Chaetostoma), a new species from the Ucayali River Basin, Peru." Zoosystematics and Evolution 100, no. 4 (2024): 1387–400. http://dx.doi.org/10.3897/zse.100.118522.

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A new species in the rubbernose catfish genus Chaetostoma is described from the Aguaytia, Pisqui and Palcazu Rivers, which drain the Pampa de Sacramento Region in the Ucayali River drainage of central Peru. The new species is distinguished from congeners, except C. anomalum, C. branickii, C. dorsale, C. leucomelas, C. microps, C. nudirostre, C. palmeri and C. thomsoni by having distinct, white, variably-shaped spots or vermiculations ½–2× nostril diameter on dark grey to black background on the head (vs. spots absent or black on light-coloured background). The new species is distinguished from

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2

Phillips, K. "DORSAL FIN STABILISES TROUT." Journal of Experimental Biology 208, no. 23 (2005): i. http://dx.doi.org/10.1242/jeb.01952.

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3

Meza-Vargas, Vanessa, Jorge L. Ramirez, and Nathan K. Lujan. "The ornate rubbernose pleco (Siluriformes, Loricariidae, Chaetostoma), a new species from the Ucayali River Basin, Peru." Zoosystematics and Evolution 100, no. (4) (2024): 1387–400. https://doi.org/10.3897/zse.100.118522.

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A new species in the rubbernose catfish genus <i>Chaetostoma</i> is described from the Aguaytia, Pisqui and Palcazu Rivers, which drain the Pampa de Sacramento Region in the Ucayali River drainage of central Peru. The new species is distinguished from congeners, except <i>C. anomalum</i>, <i>C. branickii</i>, <i>C. dorsale</i>, <i>C. leucomelas</i>, <i>C. microps</i>, <i>C. nudirostre</i>, <i>C. palmeri</i> and <i>C. thomsoni</i> by having distinct, white, variably-shaped spots or vermiculations ½–2× nostril diameter on dark grey to black background on the head (vs. spots absent or black on li

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4

Stewart, Thomas A., Justin B. Lemberg, Natalia K. Taft, Ihna Yoo, Edward B. Daeschler, and Neil H. Shubin. "Fin ray patterns at the fin-to-limb transition." Proceedings of the National Academy of Sciences 117, no. 3 (2019): 1612–20. http://dx.doi.org/10.1073/pnas.1915983117.

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The fin-to-limb transition was marked by the origin of digits and the loss of dermal fin rays. Paleontological research into this transformation has focused on the evolution of the endoskeleton, with little attention paid to fin ray structure and function. To address this knowledge gap, we study the dermal rays of the pectoral fins of 3 key tetrapodomorph taxa—Sauripterus taylori (Rhizodontida), Eusthenopteron foordi (Tristichopteridae), and Tiktaalik roseae (Elpistostegalia)—using computed tomography. These data show several trends in the lineage leading to digited forms, including the consol

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5

MATSUMOTO, TATSUYA, KEIICHI MATSUURA, and NAOTO HANZAWA. "A new species of nine-spined stickleback, Pungitius modestus (Gasterosteiformes, Gasterosteidae), from northern Honshu, Japan." Zootaxa 5005, no. 1 (2021): 1–20. http://dx.doi.org/10.11646/zootaxa.5005.1.1.

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A new species of nine-spined stickleback, Pungitius modestus, is described based on the holotype and 17 paratypes (38.7–51.7 mm standard length) collected from the inland area of Yamagata Prefecture, northern Honshu, Japan. The new species is distinguished from the other species of Pungitius by the following combination of characters: 30–32 small unconnected lateral plates; dorsal-fin rays VIII–X (usually IX)+9–11; anal-fin rays 7–10 (usually 8); pectoral-fin rays 10; a short spiny dorsal fin base (26.5%–29.8% SL); the first spiny dorsal fin spine behind the pectoral-fin base; a long pre-anal

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6

Ottoni, Felipe. "Australoheros sanguineus sp. n. - a new cichlid species from the rio Cubatão basin, southern Brazil (Cichlidae: Heroini)." Vertebrate Zoology 63, no. 2 (2013): 161–69. http://dx.doi.org/10.3897/vz.63.e31423.

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A new species of Australoheros is herein described from the rio Cubatão basin, southern Brazil. The new species differs from all its congeners mainly by the following character states: presence of a conspicuous rounded caudal-fin base; presence of two blood red regions on the corners of caudal-fin posterior margin; absence of conspicuous metallic blotches on anal-fin base; absence of a red pigmented line on dorsal-fin margin; presence of one conspicuous blue iridescence bar on dorsal-margin; more pectoral-fin rays (14); fewer proximal radials on dorsal-fin base (24 – 25); more proximal radials

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7

Ottoni, Felipe. "Australoheros sanguineus sp. n. - a new cichlid species from the rio Cubat\xc3\xa3o basin, southern Brazil (Cichlidae: Heroini)." Vertebrate Zoology 63 (August 29, 2013): 161–69. https://doi.org/10.3897/vz.63.e31423.

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A new species of Australoheros is herein described from the rio Cubatão basin, southern Brazil. The new species differs from all its congeners mainly by the following character states: presence of a conspicuous rounded caudal-fin base; presence of two blood red regions on the corners of caudal-fin posterior margin; absence of conspicuous metallic blotches on anal-fin base; absence of a red pigmented line on dorsal-fin margin; presence of one conspicuous blue iridescence bar on dorsal-margin; more pectoral-fin rays (14); fewer proximal radials on dorsal-fin base (24 – 25); more proximal radials

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8

CHUNGTHANAWONG, SIRIKANYA, and HIROYUKI MOTOMURA. "A new species of the waspfish genus Ocosia (Teleostei: Tetrarogidae) from the Coral Sea, with a key to species in the genus." Zootaxa 5091, no. 3 (2022): 37–50. http://dx.doi.org/10.11646/zootaxa.5091.3.3.

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The new waspfish Ocosia dorsomaculata n. sp. (Tetrarogidae) is described, based on specimens from Australia (5) and New Caledonia (51). Although O. dorsomaculata and Ocosia apia Poss & Eschmeyer 1975 both share modally XVI, 8 dorsal-fin rays with a long second dorsal-fin spine, and presence of supraocular, lateral lacrimal, and suborbital spines, the former has modally 13 pectoral-fin rays (vs. usually 12 in the latter), a lower modal count of total gill rakers (10 vs. 16–18), greater upper-jaw length, greater third to sixth dorsal-fin spine lengths, the third dorsal-fin spine slightly sho

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9

Benzer, Semra. "Morphometric features of topmouth gudgeon Pseudorasbora parva (Temminck & Schlegel, 1846) in the Hirfanlı Reservoir, Turkey." Acta Aquatica: Aquatic Sciences Journal 7, no. 1 (2020): 8. http://dx.doi.org/10.29103/aa.v7i1.2030.

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The aim of this study was to some morphometric characteristics of Pseudorasbora parva from Hirfanlı Reservoir, Turkey. A morphological analysis of 29 morphometric characters were performed. These characteristics head length; preorbital distance; eye diameter; postorbital distance; head depth; predorsal distance; prepelvic distance; preanal distance; pectoral fin–pelvic fin (P-V) distance; pelvic fin– anal fin (V-A) distance; body depth (18 perpendicular); dorsal fin (anterior end)-anal fin distance (Da-A); dorsal fin (posterior end)–anal fin distance (Dp-A); postdorsal distance; postanal dista

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10

LIAO, YUN-CHIH, RODOLFO B. JR REYES, and KWANG-TSAO SHAO. "Owstonia aurora (Perciformes: Cepolidae: Owstoniinae), a new bandfish from the Philippines." Zootaxa 5189, no. 1 (2022): 122–30. http://dx.doi.org/10.11646/zootaxa.5189.1.14.

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Owstonia aurora sp. nov. is described on the base of three specimens (69.8–88.0 mm in standard length) collected off East Luzon during the “Aurora 2007” Philippine Expedition. The new species differs from its congeners by the following combination of characters: dorsal-fin elements III, 21; anal-fin elements I, 14; gill rakers on first arch 35–38; cheek with 80–86 scales in 7–8 rows; lateral line without branch, not forming loop in front of dorsal-fin, ending below 17th to 22th dorsal-fin soft rays; oblique body scale rows in mid-lateral series 54–58; lower margin of preopercle rounded; promin

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11

Drucker, Eliot G., and George V. Lauder. "Locomotor function of the dorsal fin in teleost fishes: experimental analysis of wake forces in sunfish." Journal of Experimental Biology 204, no. 17 (2001): 2943–58. http://dx.doi.org/10.1242/jeb.204.17.2943.

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SUMMARYA key evolutionary transformation of the locomotor system of ray-finned fishes is the morphological elaboration of the dorsal fin. Within Teleostei, the dorsal fin primitively is a single midline structure supported by soft, flexible fin rays. In its derived condition, the fin is made up of two anatomically distinct portions: an anterior section supported by spines, and a posterior section that is soft-rayed. We have a very limited understanding of the functional significance of this evolutionary variation in dorsal fin design. To initiate empirical hydrodynamic study of dorsal fin func

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12

Rocha, Marcelo Salles, Renildo Ribeiro de Oliveira, and Lúcia H. Rapp Py-Daniel. "A new species of Gladioglanis Ferraris & Mago-Leccia from rio Aripuanã, Amazonas, Brazil (Siluriformes: Heptapteridae)." Neotropical Ichthyology 6, no. 3 (2008): 433–38. http://dx.doi.org/10.1590/s1679-62252008000300017.

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A new species of Gladioglanis is described from a single locality on rio Aripuanã, rio Madeira basin, and can be distinguished from its congeners by the following characters: dorsal-fin spine and spinelet absent, first dorsal-fin ray flexible, unbranched, followed by five branched dorsal-fin rays, pectoral-fin spine short and with few (5 anterior-side, 4 posterior-side) dentations, 22-25 anal-fin rays, round profile of the head in dorsal view, first dorsal-fin pterygiophore in contact with the neural spine of eighth vertebrae, 13 caudal-fin rays in both upper and lower lobes, and 60 total vert

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13

Ahnelt, Harald, Vanessa Robitzch, and Mohamed Abu El-Regal. "A new species of toothless, short dorsal-fin Schindleria (Gobiiformes: Gobiidae) from the Red Sea (Egypt)." Vertebrate Zoology 72 (July 19, 2022): 551–59. http://dx.doi.org/10.3897/vz.72.e79401.

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Abstract We describe a new, tiny species of Schindleria from a reef lagoon in the Red Sea off the coast of Hurghada, Egypt. Schindleria edentata, new species, belongs to the short dorsal-fin type of Schindleria, with the dorsal and anal fins of about equal length. Schindleria edentata is characterized by an elongated but relatively deep body (body depth at anal-fin origin 10.8% of SL and at 4th anal-fin ray 10.9 % of SL); a short dorsal fin originating just slightly anterior to the anal fin (predorsal-fin length 60.9% of SL, pre-anal fin length 64.8% of SL); a stubby head with a steep frontal

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14

Quan, Xinyu, Ximing Zhao, Shijie Zhang, Jie Zhou, Nan Yu, and Xuyan Hou. "Research on the Undulatory Motion Mechanism of Seahorse Based on Dynamic Mesh." Applied Bionics and Biomechanics 2021 (September 20, 2021): 1–19. http://dx.doi.org/10.1155/2021/2807236.

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The seahorse relies on the undulatory motion of the dorsal fin to generate thrust, which makes it possess quite high maneuverability and efficiency, and due to its low volume of the dorsal fin, it is conducive to the study of miniaturization of the driving mechanism. This paper carried out a study on the undulatory motion mechanism of the seahorse’s dorsal fin and proposed a dynamic model of the interaction between the seahorse’s dorsal fin and seawater based on the hydrodynamic properties of seawater and the theory of fluid-structure coupling. A simulation model was established using the Flue

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15

Du, De Feng, and Xiao Qin Jiang. "Hydrodynamic Forces Measurement in Still Water Tank and Theoretical Validation of a Bio-Dorsal Fin Propulsive System." Applied Mechanics and Materials 105-107 (September 2011): 1980–84. http://dx.doi.org/10.4028/www.scientific.net/amm.105-107.1980.

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The simulation level of prototypes mimicking torsional wave propulsion is low at present. A new prototype which uses a combination of crank and rocker mechanisms and pleated-skirt-pattern membrane is presented in this paper. The prototype’s dorsal fin is of high fidelity, the waveform looks pretty smooth and the wave amplitude can reach 85 degrees. In still pool, measurement of thrust and lateral force of dorsal fin were performed with a one-component balance. The experimental results show: 1. the thrust on the dorsal fin has periodic variation, and the frequency of thrust variation is twice t

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16

Tran Duc, Hau, Huong Dang Thi Thanh, Thuy Ta Thi, and Xuan Ngo Thanh. "Description of Pareuchiloglanis sp. (Siluriformes: Sisoridae) in the Da River basin belonging to Phong Tho district, Lai Chau province." Journal of Science Natural Science 66, no. 4F (2021): 103–15. http://dx.doi.org/10.18173/2354-1059.2021-0073.

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The genus Pareuchiloglanis (Siluriformes: Sisoridae) consists of 26 species in the world. In Vietnam, this genus has eight species, including five that are in uncertain taxonomy status. In the present study, we described one species of Pareuchiloglanis based on collections from the Da River basin in Phong Tho district, Lai Chau province. Pareuchiloglanis sp. can be distinguished from congeners by the following unique combination of characters: D. i,6; A. i,4; P1. i,14-16 (primarily i,16); C. i,6-8,6-8,i (primarily i,8,8,i); interorbital distance\eye diameter 2.4-3.4; caudal peduncle length 17.

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17

Katz, Axel M., and Maria A. Barbosa. "Re-description of Trichomycterus cubataonis BIZERRIL, 1994 (Siluriformes: Trichomycteridae) from the Cubatão river basin, southern Brazil." Vertebrate Zoology 64, no. 1 (2014): 3–8. http://dx.doi.org/10.3897/vz.64.e31457.

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Trichomycterus cubataonis, from the Cubatão river, southern Brazil, is re-described and revalidated. It is hypothesized as closely related to T. diabolus, T. itatiayae, T. maculosus and T. nigroautarus based on the presence of a broad metapterygoid, which is wider than deeper. Trichomycterus cubataonis differs from the above four species by the number of pectoral, dorsal, and anal-fins rays, origin of anal fin related to the dorsal-fin base, insertion of pelvic-fin related to the vertebrae, origin of dorsal- and anal fins related to the vertebrae, number of dorsal and ventral procurrent rays o

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Katz, Axel, and Maria Barbosa. "Re-description of Trichomycterus cubataonis BIZERRIL, 1994 (Siluriformes: Trichomycteridae) from the Cubat\xc3\xa3o river basin, southern Brazil." Vertebrate Zoology 64 (April 30, 2014): 3–8. https://doi.org/10.3897/vz.64.e31457.

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Trichomycterus cubataonis, from the Cubatão river, southern Brazil, is re-described and revalidated. It is hypothesized as closely related to T. diabolus, T. itatiayae, T. maculosus and T. nigroautarus based on the presence of a broad metapterygoid, which is wider than deeper. Trichomycterus cubataonis differs from the above four species by the number of pectoral, dorsal, and anal-fins rays, origin of anal fin related to the dorsal-fin base, insertion of pelvic-fin related to the vertebrae, origin of dorsal- and anal fins related to the vertebrae, number of dorsal and ventral procurrent rays o

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19

SATO, MASAYUKI C., and HIROYUKI MOTOMURA. "Tomiyamichthys hyacinthinus, a new species of shrimpgoby (Teleostei: Gobiidae) from southern Japan." Zootaxa 5588, no. 1 (2025): 174–84. https://doi.org/10.11646/zootaxa.5588.1.8.

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Tomiyamichthys hyacinthinus sp. nov. is described on the basis of four specimens from Kyushu, southern Japan. The new species is characterized by the following combination of characters: VI-I, 9 dorsal-fin rays; I, 9 anal-fin rays; 17 pectoral-fin rays; 45–48 lateral and 14–15 transverse scale rows; 4 + 8 or 9 (9) gill rakers of first gill arch; partially scaled prepelvic region; a pale blotch between fourth and fifth spines of first dorsal fin; second and third spines of first dorsal fin elongated, filamentous with orange bands in males; fourth spine of first dorsal fin longer than first in m

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20

Fricke, Ronald. "Callionymus madangensis, a new species of dragonet from Papua New Guinea, southwestern Pacific Ocean (Teleostei: Callionymidae)." Journal of the Ocean Science Foundation 13 (November 6, 2014): 1–15. https://doi.org/10.5281/zenodo.1050489.

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A new species of dragonet, Callionymus madangensis from Madang, Papua New Guinea, is described on the basis of a single male specimen collected with a trawl in about 30–40 m depth near Madang. The new species is characterised within the subgenus Pseudocalliurichthys by a small branchial opening; head short (3.7 in SL); eye large (2.3 in head length); preopercular spine with a short, straight main tip, six to seven curved serrae on its dorsal margin and a strong antrorse spine at its base, ventral margin smooth, slightly concave; first dorsal fin much higher than second dorsal fin, with 4 spine

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21

Ahnelt, Harald, Vanessa Robitzch, and Mohamed Abu El-Regal. "A new species of toothless, short dorsal-fin Schindleria (Gobiiformes: Gobiidae) from the Red Sea (Egypt)." Vertebrate Zoology 72 (July 19, 2022): 551–59. https://doi.org/10.3897/vz.72.e79401.

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Abstract We describe a new, tiny species of Schindleria from a reef lagoon in the Red Sea off the coast of Hurghada, Egypt. Schindleria edentata, new species, belongs to the short dorsal-fin type of Schindleria, with the dorsal and anal fins of about equal length. Schindleria edentata is characterized by an elongated but relatively deep body (body depth at anal-fin origin 10.8% of SL and at 4<sup>th</sup> anal-fin ray 10.9 % of SL); a short dorsal fin originating just slightly anterior to the anal fin (predorsal-fin length 60.9% of SL, pre-anal fin length 64.8% of SL); a stubby head with a ste

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22

Hashimoto, Shintaro, Reo Koreeda, Md Repin Izarenah, Ying Giat Seah, and Hiroyuki Motomura. "First record of Priacanthus blochii (Actinopterygii: Eupercaria: Priacanthidae) from Malaysia." Acta Ichthyologica et Piscatoria 54 (October 25, 2024): 243–47. http://dx.doi.org/10.3897/aiep.54.134405.

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A single specimen collected off Perak, Malaysia was identified as Priacanthus blochii Bleeker, 1853, being characterized by 13 dorsal-fin soft rays, 14 anal-fin soft rays, the dorsal and anal fins relatively low and rounded distally, 21 total gill rakers on the first arch, 77 scales in lateral series, the 10th dorsal-fin spine 1.59 times the length of the second dorsal-fin spine, the pectoral-fin length 48.0% of the head length, the posterior margin of the caudal fin convex, a black blotch absent anteriorly on the dorsal-fin membrane, and a single large black blotch on the pelvic-fin base. In

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23

GILL, ANTHONY C., and RANDALL D. MOOI. "Character evidence for the monophyly of the Microdesminae, with comments on relationships to Schindleria (Teleostei: Gobioidei: Gobiidae)." Zootaxa 2442, no. 1 (2010): 51. http://dx.doi.org/10.11646/zootaxa.2442.1.4.

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The composition of the Microdesminae has been inconsistently reported in recent molecular studies. A monophyletic Microdesminae consisting of both Indo-Pacific and New World/Atlantic genera is diagnosed here by the following synapomorphies: maxilla with elongate projection extending anteriorly over ascending processes of premaxilla; palatine medial process absent; single dorsal process on cleithrum; supracleithrum oriented vertically and closely applied to cleithrum; posttemporal with elongate posteroventral process; body slender and elongate, with associated increase in number of vertebrae an

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24

RETZER, MICHAEL E. "Description of a new species of Acestridium (Siluriformes: Loricariidae) from Colombia." Zootaxa 972, no. 1 (2005): 1. http://dx.doi.org/10.11646/zootaxa.972.1.1.

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Acestridium colombiensis is described from a single series of specimens from the Río Inirida, Colombia. Acestridium colombiensis can be distinguished from its congeners by a unique combination of characters: two unpaired median pre-dorsal plates, body width 10.0 –13.0% of post-dorsal fin length, inter-orbital distance between 10.6 – 13.0% of post-dorsal fin length, inter-orbital distance between 25.0 – 29.0% of eye-to-dorsal fin length; low number of jaw teeth (12–15 teeth in upper left jaw, 9–13 teeth in lower left jar), pre-dorsal fin body pigmentation not formed into distinct lines between

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25

MOOI, RANDALL D., and ANTHONY C. GILL. "Description of a new species of the fish genus Acanthoplesiops Regan (Teleostei: Plesiopidae: Acanthoclininae) from Tonga." Zootaxa 432, no. 1 (2004): 1. http://dx.doi.org/10.11646/zootaxa.432.1.1.

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Acanthoplesiops naka sp. n. is described from the 9.9 mm SL holotype collected at Ofolanga Island of the Ha apai Group of Tonga. Its dorsal-fin spine count of XVIII is unique in the genus. The following combination of characters also distinguishes it from congeners: first two dorsal-fin pterygiophores in the 3 rd interneural space (anterior dorsal-fin formula ?/?/I+I/I/I/I/I//I/I/I); 3 dentary pores; 2 intertemporal pores; head and body generally brownish with darker pigment spots (from shrunken melanophores), excepting a paler stripe from the anterior half of the symphyseal flap on the lower

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26

WHITE, WILLIAM T. "Odontanthias randalli n. sp., a new anthiine fish (Serranidae: Anthiinae) from Indonesia WILLIAM T. WHITE (Australia)." Zootaxa 3015, no. 1 (2011): 21. http://dx.doi.org/10.11646/zootaxa.3015.1.3.

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Odontanthias randalli, a new species of anthiine serranid fish from southeastern Indonesia, is described, bringing the number of known species in the genus to 14. The new species is clearly distinguished from other members of the genus by the following combination of characters: dorsal-fin soft rays 16–17, lateral-line scales 37 to 39, 3rd dorsal spine longest, 3rd dorsal-fin soft ray the only filamentous dorsal-fin ray, caudal fin lunate with extremely long filamentous lobes, depth of body 2.2 to 2. 5 in SL, vomerine-tooth patch arrowhead shaped, and body pinkish with bright yellow spots on u

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Rowe, Lucy E., and Stephen M. Dawson. "Laser photogrammetry to determine dorsal fin size in a population of bottlenose dolphins from Doubtful Sound, New Zealand." Australian Journal of Zoology 56, no. 4 (2008): 239. http://dx.doi.org/10.1071/zo08051.

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Laser photogrammetry (also known as laser-metrics) can provide valuable morphological data but the measurement error associated with the technique has not been quantified. Here laser-metrics were used to measure the dorsal fins of an entire resident population of bottlenose dolphins (Tursiops truncatus) from Doubtful Sound, New Zealand. Dorsal fin base length, height and surface area were measured from dorsal fin photographs. Sources of measurement error were estimated by repeatedly measuring multiple photographs of dorsal fins of known individuals. Measurement error accounted for less than 6%

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FUJIWARA, KYOJI, TOSHIYUKI SUZUKI, and HIROYUKI MOTOMURA. "Callogobius falx, a new species of goby from southern Japan." Zootaxa 5048, no. 2 (2021): 253–64. http://dx.doi.org/10.11646/zootaxa.5048.2.6.

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Callogobius falx n. sp. (Gobiidae) is described on the basis of two specimens (14.4 and 23.1 mm in standard length: SL) from the Ryukyu Islands, southern Japan. The new species is characterized by the following combination of characters: dorsal-fin rays VI-I, 8 or 9; anal-fin rays I, 7; pectoral-fin rays 18 or 19; lateral scale rows 20–22; body depth moderate, neither particularly slender nor deep (depth at pelvic-fin origin 18.3–20.0% of SL); pelvic-fin base with frenum; caudal-fin length moderate, margin rounded; cephalic sensory-canal pores absent; interorbital papillae row separated, formi

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29

CHEN, I.-SHIUNG, and JHY-YUN SHY. "Two new species of Paratanakia (Teleostei: Cyprinidae) from Taiwan and mainland China." Zootaxa 5550, no. 1 (2024): 250–57. https://doi.org/10.11646/zootaxa.5550.1.25.

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Two new species of bitterling of Paratanakia were found and collected from Taiwan island and Fujian Province, mainland China recently. Paratanakia fuvlidorsalis n. sp. which is endemic in Taiwan island can be well distinguished from other congeners by the following unique combination of features: (1) fin ray counts: dorsal fin rays 3, 8; anal fin rays 3, 10; pectoral fin rays modally 1, 12; (2) squamtion: lateral-line scales modally 34; and (3) its own specific dorsal fin color pattern in male. Paratanakia julongjiangensis n. sp. which is endemic in Fujian Province, mainland China can be well

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30

SOTO, JULES M. R., and CAROLUS M. VOOREN. "Hydrolagus matallanasi sp. nov. (Holocephali, Chimaeridae) a new species of rabbitfish from southern Brazil." Zootaxa 687, no. 1 (2004): 1. http://dx.doi.org/10.11646/zootaxa.687.1.1.

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Hydrolagus matallanasi sp. nov., the first species of the genus in the southwest Atlantic, is described from 21 specimens collected on the continental slope of southern Brazilian at 416 736 m depth. This new species can be distinguished from its congeners by the following combination of characters: an irregular brown coloration with reticulations and spots over the body; ventral surface whitish, including pectoral bases; proximal margin of the second dorsal fin whitish; tooth plates striped and bicolor, yellowish and gray; length of dorsal fin spine equal to or a slightly longer than head leng

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31

Gonzalez-Acosta, Adrian F., and Rocio Rodiles-Hernandez. "New species of Eugerres from the Usumacinta Province, México and Guatemala with a redescription of E. mexicanus (Steindachner, 1863) (Teleostei: Gerreidae)." Neotropical Ichthyology 11, no. 2 (2013): 307–18. http://dx.doi.org/10.1590/s1679-62252013000200009.

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Eugerres castroaguirrei, new species is described from the río Grijalva-Usumacinta basin of southeastern Mexico and northern Guatemala. Eugerres castroaguirrei and E. mexicanus are distinguishable from their marine estuarine congeners by the dorsal-fin origin posterior to the insertion of the pectoral and pelvic fins, a shorter and broad based supraoccipital crest, and a distinct geographic distribution restricted to freshwater habitats. Eugerres castroaguirrei differs from E. mexicanus by diagnostic characters of the body skeleton: anterior process of supraoccipital convex, infraorbital 1 wit

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32

HO, HSUAN-CHING, and MIRANDA VAN HEDEN. "A new species of the sandperch genus Parapercis from the Philippines Perciformes: Pinguipedidae)." Zootaxa 4341, no. 4 (2017): 563. http://dx.doi.org/10.11646/zootaxa.4341.4.8.

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A new species sandperch, Parapercis altipinnis, is described based on the holotype collected from Cebu, the Philippines at 55–65 m by SCUBA. The new species belongs to the P. cylindrica complex and can be distinguished by an extremely high first dorsal fin, the first spine slightly longer than the head; 3 predorsal scales; 42 or 43 lateral-line scales; teeth present on vomer and palatines. The body is reddish dorsally and blackish ventrally, with 5 large brownish saddles alternating with white bands on dorsal surface; scattered dots on top of head, first dorsal fin and dorsal surface; first do

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33

TEA, YI-KAI, BENJAMIN W. FRABLE, and ANTHONY C. GILL. "Cirrhilabrus cyanogularis, a new species of fairy wrasse from the Philippines and Indonesia (Teleostei: Labridae)." Zootaxa 4418, no. 6 (2018): 577. http://dx.doi.org/10.11646/zootaxa.4418.6.5.

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Cirrhilabrus cyanogularis, sp. nov., is described on the basis of the holotype and three paratypes from Banguingui Island, Sulu Archipelago, Philippines, and a paratype from Sulawesi, Indonesia. The new species belongs to a complex consisting of C. filamentosus (Klausewitz), C. rubripinnis Randall & Carpenter, and C. tonozukai Allen & Kuiter. Aside from similar nuptial male coloration, the four species share the following character combination: a single row of cheek scales; dorsal-fin spines taller than dorsal-fin rays (slightly incised between spinuous and soft dorsal fin in C. rubrip

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34

NG, HEOK HEE, and LALRAMLIANA _. "Pseudolaguvia spicula, a new sisorid catfish (Teleostei: Sisoridae) from Bangladesh and northeastern India." Zootaxa 2558, no. 1 (2010): 61. http://dx.doi.org/10.11646/zootaxa.2558.1.5.

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This study describes Pseudolaguvia spicula, a new miniature sisorid catfish from the Surma-Meghna River system in India and Bangladesh. Pseudolaguvia spicula can be distinguished from congeners in having a combination of: head width 19.2–22.6% SL, dorsal-fin spine length 11.6–14.3% SL, length of dorsal-fin base 13.2–15.9% SL, pectoral-fin spine length 15.7–17.4% SL, length of adipose-fin base 14.7–17.1% SL, pelvic-fin length 14.6–17.1% SL, body depth at anus 12.8–16.8% SL, caudal peduncle length 15.4–17.9% SL, caudal peduncle depth 7.9–9.6% SL, caudal-fin length 24.2–27.5% SL, snout length 48.

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35

Greenfield, David W., and Mark V. Erdmann. "Eviota amphipora, a new dwarfgoby from Papua New Guinea (Teleostei: Gobiidae)." Journal of the Ocean Science Foundation, 36 (September 8, 2020): 1–5. https://doi.org/10.5281/zenodo.4018175.

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A new species of dwarfgoby, <em>Eviota amphipora </em>n. sp., is described from Milne Bay, Papua New Guinea. The new species has a cephalic sensory-canal pattern having only the supraotic (SOT) and paired posterior interorbital (PITO) pores, only the second described <em>Eviota</em> species with this distinctive pattern. It has a dorsal/anal fin-ray formula of 9/8, one or more branched pectoral-fin rays, the fifth pelvic-fin ray a rudiment, and six postanal spots. The color pattern is also diagnostic: a translucent gray body with iridescent blue on the dorsal and anal fins and two diagonal dar

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36

Fricke, Ronald. "Callionymus petersi, a new species of dragonet from New Ireland, Papua New Guinea, western Pacific Ocean (Teleostei: Callionymidae)." Journal of the Ocean Science Foundation 21 (May 29, 2016): 38–57. https://doi.org/10.5281/zenodo.53743.

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A new species of dragonet, Callionymus petersi from northern New Ireland Province, Papua New Guinea, is described on the basis of five specimens collected with dredges and trawls in about 181–207 m depth from off northwestern New Hanover and off Kavieng. The new species is characterized within the subgenus Bathycallionymus by a short head (3.9–4.3 in SL); eye large (2.1–2.3 in head length); preopercular spine with a long, slightly upcurved main tip, a small antrorse serra followed by two large curved points on its dorsal margin and a strong antrorse spine at its base, ventral margin smooth, sl

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37

WILLIAMS, JEFFREY T., and DAVID LECCHINI. "Parioglossus galzini, a new species of ptereleotrid dartfish from Rapa Island (Teleostei: Gobioidei: Ptereleotridae)." Zootaxa 506, no. 1 (2004): 1. http://dx.doi.org/10.11646/zootaxa.506.1.1.

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A new species of dart fish, Parioglossus galzini sp. nov., is described based on specimens collected in Haurei Bay, Rapa Island (French Polynesia). It is distinguished from all other described species of Parioglossus as follows: dark lateral body stripe absent, 100 or more scales in longitudinal series from above pectoral-fin base to base of caudal fin, pectoral-fin rays 19 21, membrane of first dorsal fin attached to second dorsal fin in males and females, mature males with dorsal-fin spines 3 5 filamentous and about equal in length, fresh males with narrow yellow stripe running dorsolaterall

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38

HO, HSUAN-CHING, HIROYUKI MOTOMURA, HARUTAKA HATA, and WEI-CHUAN JIANG. "Review of the fish genus Epinnula Poey (Perciformes: Gempylidae), with description of a new species from the Pacific Ocean." Zootaxa 4363, no. 3 (2017): 393. http://dx.doi.org/10.11646/zootaxa.4363.3.5.

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The gempylid fish genus Epinnula is reviewed and two species are recognized. The type species E. magistralis is considered restricted to the western Atlantic Ocean and a new species from the Pacific Ocean is described. The new species, Epinnula pacifica sp. nov., can be distinguished from E. magistralis by 17 or 18 dorsal-fin rays (vs. 15 or 16 in E. magistralis), 15 or 16 anal-fin rays (vs. 13 or 14), 247–268 total scales on lower lateral line (vs. 285–330), a deeper body, relatively high dorsal fin as reflected by the relatively long fin spines and rays, longer dorsal-fin and anal-fin bases,

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39

YATO, TAKUJI, and ELAINE HEEMSTRA. "A new deepwater gurnard of the genus Pterygotrigla (Scorpaeniformes: Triglidae) from the southwestern Indian Ocean." Zootaxa 4706, no. 1 (2019): 189–200. http://dx.doi.org/10.11646/zootaxa.4706.1.8.

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A new species of deepwater gurnard, Pterygotrigla (Otohime) madagascarensis sp. nov. is described, based on two specimens collected on the upper continental slope south of Madagascar, in the southwestern Indian Ocean. The new species belongs to the tropical Indo-Pacific subgenus Otohime in having a short rostral projection, short posttemporal spine, long opercular spine and no cleithral spine. It is most similar to P. (O.) multipunctata, and P. (O.) urashimai, in having no large blotch on the first dorsal fin, a jet-black blotch and no white ocellus on the inner pectoral-fin surface, with no s

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40

Endruweit, Marco. "Description of a new dwarf snakehead (Perciformes: Channidae) from western Yunnan." Vertebrate Zoology 67, no. 2 (2017): 173–78. http://dx.doi.org/10.3897/vz.67.e31581.

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Channa shingon, new species, is described from small mountainous rivulets associated with the Irrawaddy drainage in western Yunnan Province, China. Its maximum SL of about 100 mm makes it the smallest pelvic-fin bearing dwarf snakehead. Further specific characters are lateral head length 27 – 30 % SL; interorbital width 33 – 35 % HL; 25 – 27 anal-fin rays; 44 – 45 lateral-line scales; 4 – 5 scale rows between dorsal-fin origin and lateral line; 8 – 9 scale rows between lateral line and anal-fin origin; 1 mandibular scale; 43 – 44 vertebrae; inferomesial process of parasphenoid very shallow and

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41

Endruweit, Marco. "Description of a new dwarf snakehead (Perciformes: Channidae) from western Yunnan." Vertebrate Zoology 67 (October 13, 2017): 173–78. https://doi.org/10.3897/vz.67.e31581.

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Channa shingon, new species, is described from small mountainous rivulets associated with the Irrawaddy drainage in western Yunnan Province, China. Its maximum SL of about 100 mm makes it the smallest pelvic-fin bearing dwarf snakehead. Further specific characters are lateral head length 27 – 30 % SL; interorbital width 33 – 35 % HL; 25 – 27 anal-fin rays; 44 – 45 lateral-line scales; 4 – 5 scale rows between dorsal-fin origin and lateral line; 8 – 9 scale rows between lateral line and anal-fin origin; 1 mandibular scale; 43 – 44 vertebrae; inferomesial process of parasphenoid very shallow and

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42

WU, QIANQIAN, XUEJIAN DENG, YANJIE WANG, and YONG LIU. "Rhinogobius maculagenys, A new species of freshwater goby (Teleostei: Gobiidae) from Hunan, China." Zootaxa 4476, no. 1 (2018): 118. http://dx.doi.org/10.11646/zootaxa.4476.1.11.

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A new freshwater goby, Rhinogobius maculagenys sp. nov., was collected from Hunan Province in Southern China. This species can be distinguished from all congeners by a combination of the following features: first dorsal fin with 6 spines; second dorsal fin with a single spine and 7–9 segmented rays; anal fin with a single spine and 6–8 segmented rays; pectoral fin with 16 segmented rays; 32–34 longitudinal scales; 9–13 transverse scales; 11+16=27 vertebrae; pore ω1 missing; head and body yellowish brown; cheek and opercle yellowish brown with over 30 small orange spots, branchiostegal membrane

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43

VIJAYAKRISHNAN, BALAJI, and JAYASIMHAN PRAVEENRAJ. "Mystus irulu, a new species of bagrid catfish from the Western Ghats of Karnataka, India (Teleostei: Bagridae)." Zootaxa 5120, no. 3 (2022): 443–48. http://dx.doi.org/10.11646/zootaxa.5120.3.10.

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Mystus irulu, new species, is described from the Netravathi River system from the Western Ghats of Karnataka. It differs all South Asian congeners in having a uniformly black colour pattern, a long-based adipose fin reaching the base of the last dorsal-fin ray anteriorly, dorsal fin with convex dorsoposterior margin, and the following combination of characters: body depth at anus 19.9–22.3 % SL, dorsal-fin spine length 17.5–18.7 % SL, adipose-fin base 34.2–38.4 % SL, caudal peduncle depth 10.6–11.9 % SL and eye diameter 27.2–37.1 % HL.

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44

Allen, Gerald R., Mark V. Erdmann, and William D. Brooks. "Vanderhorstia vandersteene, a new species of shrimpgoby (Pisces: Gobiidae) from Papua New Guinea." Journal of the Ocean Science Foundation 35 (July 25, 2020): 65–75. https://doi.org/10.5281/zenodo.3959464.

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A new species of gobiid fish, <em>Vanderhorstia vandersteene</em>, is described from the East Cape region of Milne Bay Province, Papua New Guinea on the basis of five specimens 17.5–32.2 mm SL. Diagnostic features include dorsal-fin elements VI-I,10–12; the fourth dorsal-fin spine filamentous, reaching the base of about the fifth to seventh segmented dorsal-fin ray when adpressed; anal-fin rays I,11; pectoral-fin rays 16–18; lateral scales 35–37; transverse scales 10; body scales mostly ctenoid, except cycloid scales anterior to the level of about the second-dorsal-fin

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45

Abbott, Jeremy C., and Lawrence M. Dill. "Patterns of Aggressive Attack in Juvenile Steelhead Trout (Salmo gairdneri)." Canadian Journal of Fisheries and Aquatic Sciences 42, no. 11 (1985): 1702–6. http://dx.doi.org/10.1139/f85-213.

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Nipping is a potentially damaging aggressive behavior of juvenile steelhead trout (Salmo gairdneri). By analyzing videotaped interactions of pairs of fish we determined where nips were aimed and where they contacted the opponent's body. Patterns of fin damage were also assessed. Aims and nips (contacts) were distributed differently in reciprocal and nonreciprocal aggressive bouts. In nonreciprocal bouts, aims were directed mainly at the dorsal fin, central body section, and caudal fin. Nip contact was biased towards the caudal fin. In reciprocal bouts, both aims and nips were concentrated on t

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46

YANG, JIAN, XIAOYONG CHEN, and JUNXING YANG. "A new species of Metahomaloptera (Teleostei: Balitoridae) from China." Zootaxa 1526, no. 1 (2007): 63–68. http://dx.doi.org/10.11646/zootaxa.1526.1.4.

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A new species of Metahomaloptera, M. longicauda, is described from the lower Jinsha River, China. The new species is distinguished from other species of Metahomaloptera by the following combination of characters: pectoral fin with 11– 15 branched rays, tip of pectoral fin extending beyond origin of dorsal fin, pelvic fin with 10–12 branched rays, pelvicfin tip reaching or extending beyond anus, dorsal fin inserting before middle of body, tip of dorsal fin far from vertical line of caudal-fin base, head width 19.4–22.6% SL, pre-pectoral length 8.4–9.9% SL, pre-anal length 69.0–74.3% SL, caudal

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47

FRASER, THOMAS H., and JOHN E. RANDALL. "Two new species of deeper dwelling Apogon (Perciformes: Apogonidae) from Micronesia and South Pacific Ocean." Zootaxa 171, no. 1 (2003): 1. http://dx.doi.org/10.11646/zootaxa.171.1.1.

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Apogon brevispinis is described from two specimens, the larger of which is missing the caudal peduncle, collected at the Austral Islands. This species has a tiny first dorsal-fin spine (5-8% of the third dorsal-fin spine length), 18-19 well-developed gill rakers on first arch, 5 predorsal scales, elongated last soft dorsal and anal fin-rays, 14 circumpeduncular scales, 5 broad tan-brown stripes alternating with 5 narrow whitish stripes, and an irregular dark caudal peduncle mark. Apogon regula is described from five specimens collected in Guam and the Carolina Islands. This species has a longe

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48

Ba, Ming. "Description of a New Species Named Cabillus wui of Genus Cabillus (Teleostei: Gobiiformes: Gobiidae) from Southeastern China Sea." International Journal of Biology and Life Sciences 4, no. 3 (2023): 1–5. http://dx.doi.org/10.54097/19br7k90.

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A tiny goby collected from Taiwan Strait which has been identified as a member of genus Cabillus seems individual, named Cabillus wui sp. nov.. Many pieces of evidence point to it as a new species. This species could be distinguished as follows. There is a dark blotch on the first-dorsal-fin membrane; predorsal scales 6; the first dorsal spine very depressed, is the longest, and is very close to the second dorsal spine; pelvic sucker is emarginated; median predorsal scales is present; all pectoral-fin elements are 20 branched soft rays; every fin nearly completely patternless and transparent e

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49

Zhong, Qiang, Haibo Dong, and Daniel B. Quinn. "How dorsal fin sharpness affects swimming speed and economy." Journal of Fluid Mechanics 878 (September 10, 2019): 370–85. http://dx.doi.org/10.1017/jfm.2019.612.

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Multi-fin systems, like fish or fish-inspired vehicles, are governed by unsteady three-dimensional interactions between their multiple fins. In particular, dorsal/anal fins have received much attention because they are just upstream of the main thrust-producing fin: the caudal (tail) fin. We used a tuna-inspired fish model with variable fin sharpness to study the interaction between elongated dorsal/anal fins and caudal fins. We found that the performance enhancement is stronger than previously thought (15 % increase in swimming speed and 50 % increase in swimming economy) and is governed by a

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50

Ottoni, Felipe, Pedro H. N. Bragança, Pedro Amorim, and Cecile Gama. "A new species of Laetacara from the northern Brazil coastal floodplains (Teleostei: Cichlidae)." Vertebrate Zoology 62, no. 2 (2012): 181–88. http://dx.doi.org/10.3897/vz.62.e31385.

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Laetacara flamannellus sp. n. is described from the northern Brazilian coastal floodplains. It differs from all its congeners by a combination of character states: presence of a dark brown or black spot located on dorsal-fin base; presence of a yellow stripe on the middle portion of the dorsal fin, crossing the whole fin; presence of an orange ring around the dorsal-fin base spot; absence of a red pigmentation on belly; absence of a red or purple zone on the anal-fin base; absence of a red zone on the caudal-fin base; cycloid scales on the opercle plate; and trunk scales above upper lateral li

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