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Crocodile Flathead

Cociella crocodilus (Cuvier 1829)

Diagnostic Description

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Brownish with small dark spots on upper body; usually with 4-5 dark brown bands crosses back; spiny dorsal with broad black band near edge and small black spots below, other fins darkly spotted (Ref. 4315).
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Cristina V. Garilao
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Morphology

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Dorsal spines (total): 9; Dorsal soft rays (total): 11; Analspines: 0; Analsoft rays: 11
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Trophic Strategy

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Occur from near shore to 100 m depth (Ref. 4315), on sand or mud bottoms. Larvae and juveniles rarely enter mangrove areas, most especially the lower reaches (Ref. 43081). Carnivore, feeds on fish, shrimps, and benthic organisms (Ref. 43081).
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Grace Tolentino Pablico
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Biology

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Occur from near shore to 100 m depth (Ref. 4315, 11230), on sand or mud bottoms. Larvae and juveniles rarely enter mangrove areas, most especially the lower reaches (Ref. 43081).
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Pascualita Sa-a
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分布

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分布於印度-西太平洋區,由紅海、東非到索羅門群島,北至日本南部,南至澳洲。臺灣分布於北部、東北部、西部、南部及澎湖海域等。
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臺灣魚類資料庫
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利用

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漁期全年皆有,可利用底拖網、延繩釣等漁法捕獲,肉質細緻味美,適合油煎或清蒸。
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描述

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體延長,平扁,向後漸細尖,縱剖面略呈圓柱狀。頭部呈縱扁,眶間隔稍寬。吻平扁,中長,約為眼徑之1.3-1.5倍。眶上稜低平,後方具5-8小棘;眶前骨中部有1銳棘;眶下骨脊於眼前具1棘,眼後則有2棘;眶後無棘。口大,下頜突出。上下頜具細齒,無犬齒。虹膜瓣為簡單型。前鰓蓋骨具2棘,第 1棘略長於第 2棘,第 1棘短於眼徑之1/2。無間鰓蓋膜。鰓膜與峽部分離,鰓耙數為7。兩枚背鰭分離但接近。背鰭硬棘I, VIII,第I棘很短,軟條11;臀鰭僅有軟條11。脊椎骨數為27。側線完整,側線鱗數50-56,前部數個鱗具小棘。體背綠褐色,腹部白色,背部散布若干黑色小斑點,並有數道不明顯的寬暗色橫斑。背鰭硬棘部具寬暗緣,軟條部具暗色小點;臀鰭鰭膜暗色;胸鰭下半部暗色,並散有黑色小點;尾鰭顏色多變,通常具有多條暗色斑紋或成列的斑點。
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棲地

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主要棲息於砂泥底水域。底棲性魚類,以小魚及甲殼類為食
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Crocodile flathead

provided by wikipedia EN

The crocodile flathead (Cociella crocodilus) is a species of marine ray-finned fish belonging to the family Platycephalidae, the flatheads. It is found in the western Pacific Ocean.[2]

Taxonomy

The crocodile flathead was first formally described as Platycephalus crocodilus in 1829 by the French zoologist Georges Cuvier,[3] the species was not described from a type specimen, it was based on an illustration and so is an iconotype.[4] In 1925 David Starr Jordan and Carl Leavitt Hubbs proposed a new genus, Cocius, and named P. crocodilus as its type species. However, this was preoccupied by an antlion named by the Spanish entomologist Longinos Navás in 1921,[5] and in 1940 Gilbert Percy Whitley proposed a new name for this genus Cociella, a diminutive of Jordan and Hubbs original name.[6]

The crocodile flathead was considered to have a wide Indo-Pacific distribution but in 1996 Leslie W. Knapp described three new species and removed a fourth C. punctata from being a synonym of C. crocodilus. As a consequence C. crocodilus sensu stricto was restricted to the western Pacific Ocean.[4]

The specific name crocodilus means "crocodile", a reference to the flattened, crocodile like head and comes from an illustration caption in Tilesius 1814 but as Tilesius's name was printed in Cyrillic script, it is not available under the ICZN.[7]

Description

The crocodile flathead typically has 11 soft rays in the second dorsal fin and the anal fin. There are 2 spines on the suborbital ridge but no spines to the rear of the eye. The top spine on the preoperculum is relatively long almost extending to the margin of the operculum. There is usually no preorbital spine, although there is sometimes a very small one. There are between 74 and 91 diagonal scale rows above the lateral line. There are typically 7, although there may be one more or one less, gill rakers on the first gill arch. There are no flaps in between the opercula.[4] The overall colour is brownish with a number small dark spots on the upper body and typically there are 4 or 5 dark brown bands crossing the back. The first dorsal fin has a wide black band near its margin with small black spots below that. The other fins have dark spots. This species attains a maximum published length of 50 cm (20 in).[2]

Distribution and habitat

The crocodile flathead was considered to have a wide Indo-Pacific distribution but the revised species is restricted to the western Pacific Ocean in Japan, China and Taiwan.[1] It occurs from close to the shore down to 100 m (330 ft) on substrates of sand or mud. The larvae and juveniles occasionally enter brackish waters in mangroves, particularly the lower reaches.[2]

References

  1. ^ a b Motomura, H. & Matsuura, K. (2016). "Cociella crocodila". IUCN Red List of Threatened Species. 2016: e.T69786877A69800832. doi:10.2305/IUCN.UK.2016-3.RLTS.T69786877A69800832.en. Retrieved 4 July 2022.
  2. ^ a b c d Froese, Rainer; Pauly, Daniel (eds.) (2022). "Cociella crocodilus" in FishBase. February 2022 version.
  3. ^ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Cociella". Catalog of Fishes. California Academy of Sciences. Retrieved 4 July 2022.
  4. ^ a b c Leslie W. Knapp (1996). "Review of the genus Cociella Whitley (Teleostei: Platycephalidae) with the description of three new species". Proceedings of the Biological Society of Washington. 109 (1): 17–33.
  5. ^ "Cocius angustatus Navás, 1921". GBIF.
  6. ^ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Platycephalidae". Catalog of Fishes. California Academy of Sciences. Retrieved 4 July 2022.
  7. ^ Christopher Scharpf & Kenneth J. Lazara, eds. (7 December 2021). "Order Perciformes (Part 11): Suborder Platycephaloidei: Families Bembridae, Parabembridae, Hoplichthyidae, Platycephalidae and Plectrogeniidae". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 4 July 2022.
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Crocodile flathead: Brief Summary

provided by wikipedia EN

The crocodile flathead (Cociella crocodilus) is a species of marine ray-finned fish belonging to the family Platycephalidae, the flatheads. It is found in the western Pacific Ocean.

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