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Dark Deepwater Snake Eel

Ophichthus aphotistos McCosker & Chen 2000

Diagnostic Description

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Body uniformly grayish or brown to nearly black. Dorsal fin origin well behind pectoral fin tips; pectoral fin rounded, not elongate and well-developed. Posterior nostril a hole above the upper lip, covered by a flap that extends to or below the edge of the mouth. Upper lip lacks barbels between anterior and posterior nostrils. Pores small but conspicuous, SO 1 + 4, IO 4 + 2, POM 6 +2. Teeth small and conical, biserial on anterior vomer and jaws (Ref. 40865).
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Recorder
Estelita Emily Capuli
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Morphology

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Vertebrae: 158 - 162
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Biology

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This species is captured by trawl over sand and muddy bottom between 36-1350 and observed from submersibles to be most abundant between 250-350 m, with only the heads exposed over sandy substrates or resting on the sediment with their bodies in S-shaped curves (Ref. 86730). Mature females collected 48-62.8 cm TL (Ref. 40865).
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分布

provided by The Fish Database of Taiwan
發現於臺灣西南部琉球溝海域。
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利用

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罕見物種,無任何漁業利用,僅具有研究價值。
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描述

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體長為體鰓孔處體高的34.0-39.0倍,為頭長的12.4-13倍,為頭部和軀幹和長的2.5倍,為背鰭起點前距的7.4倍。軀幹長為頭長的4.0-4.1倍。頭長為眼徑的9.4-10.1倍。上頜長為眼徑的3.0-3.4倍。背鰭前距為頭長的1.7倍。脊椎骨總數為158-162,背鰭起點前平均為17.6,肛門前平均為59。體中等延長,軀幹部略呈橢圓形,尾部較側扁。吻圓。下頜較上頜為短;口裂伸達眼後緣稍後垂直下方。眼中等大。上頜無鬚或皮突。背鰭起點在胸鰭末端後方。背鰭和臀鰭低,但可見。尾端尖禿。胸鰭不延長,後緣較圓。齒細小而尖,為後斜。前頜骨齒7顆,每側各3顆,呈1列排列,另1顆位於兩列後部的中間;上頜齒2列;下颌齒2列,齒稍大;鋤骨齒緊接前頜骨齒,前部為不規則2列,後部合為1列。酒精浸泡標本體色為單一的暗灰色至黑色。下唇邊緣和口角處有細小的黑點呈線狀排列。胸鰭、背鰭和臀鰭的邊緣暗灰色。
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棲地

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為深海性魚類,棲息沙泥底質的海域。
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Dark deepwater snake eel

provided by wikipedia EN

The dark deepwater snake eel[1] (Ophichthus aphotistos) is an eel in the family Ophichthidae.[2] It was described by John E. McCosker and Chen Yu-Yun in 2000.[3] It is a marine, deep water-dwelling eel which is known from Taiwan, in the northwestern Pacific Ocean. It dwells at a depth range of 36–1350 m (most commonly 250–350 m), and inhabits sand and mud. Specimens have been observed in burrows with only their heads exposed, or resting on sediment with their bodies curved in an S shape. Females can reach a maximum total length of 62.8 cm.[2]

The specific epithet aphotistos, meaning dark or obscure, refers both to the eel's appearance and its habitat.[2]

References

  1. ^ Common names for Ophichthus aphotistos at www.fishbase.org.
  2. ^ a b c Ophichthus aphotistos at www.fishbase.org.
  3. ^ McCosker, J. E. and Y.-Y. Chen, 2000 [ref. 25028] A new species of deepwater snake-eel, Ophichthus aphotistos, with comments on Neenchelys retropinna (Anguilliformes: Ophichthidae) from Taiwan. Ichthyological Research v. 47 (no. 4): 353-357.
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Dark deepwater snake eel: Brief Summary

provided by wikipedia EN

The dark deepwater snake eel (Ophichthus aphotistos) is an eel in the family Ophichthidae. It was described by John E. McCosker and Chen Yu-Yun in 2000. It is a marine, deep water-dwelling eel which is known from Taiwan, in the northwestern Pacific Ocean. It dwells at a depth range of 36–1350 m (most commonly 250–350 m), and inhabits sand and mud. Specimens have been observed in burrows with only their heads exposed, or resting on sediment with their bodies curved in an S shape. Females can reach a maximum total length of 62.8 cm.

The specific epithet aphotistos, meaning dark or obscure, refers both to the eel's appearance and its habitat.

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