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Schmidt's Headlightfish

Diaphus schmidti Tåning 1932

Biology

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Meso- and benthopelagic at 15-100 m at night, 490-625 m during day (Ref. 58302).
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分布

provided by The Fish Database of Taiwan
分布於太平洋熱帶及亞熱帶海域。臺灣則發現於西南部及東部周邊水域。
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利用

provided by The Fish Database of Taiwan
一般以底拖網捕獲,不具食用經濟價值,通常做為下雜魚用。
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描述

provided by The Fish Database of Taiwan
體延長,側扁,後部略細。頭中等大。吻短,鈍圓。眼大。口大,上頜骨狹長而延伸至前鰓蓋後緣,末端不擴大;上下頜、鋤骨、腭骨均具齒帶。體被大而薄圓鱗,易脫落;側線平直。背鰭單一,位於體中部,具軟條14-15,後部另具一脂鰭;臀鰭基底略等於背鰭基底,具軟條15-16;腹鰭起點與背鰭起點相對;胸鰭具軟條11;尾鰭叉形,尾鰭副鰭條柔軟。各部位之發光器位置於下:眶前發光器(Ant)無;鼻部背位發光器(Dn)及鼻部腹位發光器(Vn)在鼻器和眶前緣之間處相連,DN的大小隨生長和性別而有變異;眶下位發光器(So)無;鰓蓋位發光器(Op)2個,位於前鰓蓋後緣下方,Op1明顯較Op2小,上下相接近;鰓被架位發光器(Br)3個;胸鰭上方發光器(PLO),位於側線與胸鰭基部間,距側線約為其直徑3倍處,其下方有一大於PLO約3-4倍的發光鱗;胸鰭下方發光器(PVO)2個,兩者與PO1成一斜線;胸部發光器(PO)5個,PO4位置昇高,與PVO2在一水平線上;腹部發光器(VO)5個,VO3位置最高;腹鰭上位發光器(VLO)位於腹鰭和側線之間,接近側線;臀鰭上方發光器(SAO)3個,三者排列呈直線或斜線狀,SAO1高於VO5;體後側位發光器(Pol)1個,在脂鰭下方,緊鄰側線下緣;臀鰭前部發光器(AOa)6-8個,AOa1位置昇高,但不超過SAO2,最後一個亦昇高,六者排列呈淺弧形;臀鰭後部發光器(AOp)4-6個,沿尾柄腹側水平狀排列,最後一個不昇高;尾鰭前位發光器(Prc)4個,四個依次昇高呈半弧形排列,Prc4在側線下方約發光器直徑的1-2倍處。尾部發光腺無。
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棲地

provided by The Fish Database of Taiwan
似大洋性中層巡游魚類,一般棲息於100-750公尺以上,生態習性不甚明瞭。
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Diaphus schmidti

provided by wikipedia EN

Diaphus schmidti, is a species of lanternfish found in the Widespread areas of the tropical and the subtropical Pacific Ocean.[1]

Size

This species reaches a length of 5.3 cm (2.1 in).[2]

Etymology

The fish is named in honor of Danish biologist Johannes Schmidt (1877–1933), who led the Dana expedition that collected the type specimen.[3]

References

  1. ^ Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984. The fishes of the Japanese Archipelago. Vol. 1. Tokai University Press, Tokyo, Japan. 437 p. (text)..
  2. ^ Froese, Rainer; Pauly, Daniel (eds.) (2015). "Diaphus schmidti" in FishBase. February 2015 version.
  3. ^ Christopher Scharpf & Kenneth J. Lazara (22 September 2018). "Order MYCTOPHIFORMES (Lanternfishes)". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 1 March 2023.
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Diaphus schmidti: Brief Summary

provided by wikipedia EN

Diaphus schmidti, is a species of lanternfish found in the Widespread areas of the tropical and the subtropical Pacific Ocean.

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