Anomalous Lanternfish

Anal organs 6; photophores smaller than in other species of the genus; supraventral organ nearer to lateral line than to pelvic base; three ventral organs, 3 supra-anal organs, and 3 anterior anal organs, widely separated, 2 posterior anal organs and the last over anterior margin of infracaudal gland; three precaudal organs, the first 2 very close together, the 3rd far distant at end of lateral line; 3rd supranal organ and posterolateral organs about their respective diameters below lateral line; supracaudal gland slightly shorter than infracaudal gland (Ref. 39633).

Oceanodromous. Migrating within oceans typically between spawning and different feeding areas, as tunas do. Migrations should be cyclical and predictable and cover more than 100 km.

Dorsal spines (total): 0; Dorsal soft rays (total): 13 - 16; Analspines: 0; Analsoft rays: 13 - 15

Oceanic, found between 800-2,000 m during the day and mainly below 1,000 m at night. Small specimens in colder water to 330 m (Ref. 4479). Meso- and bathypelagic (Ref. 58302).

Lampadena anomala

This rare, large species (to 180 mm; Hulley, 1981) is found in all oceans (Nafpaktitis and Paxton, 1968; Nafpaktitis and Nafpaktitis, 1969; Clarke, 1973). In the Atlantic L. anomala is thought to be a deep-living species found in tropical and subtropical waters (Backus et al., 1977). The eight specimens in the Ocean Acre collections, three juveniles 22–26 mm and five postlarvae 8–16 mm, were caught from March to September. The largest juvenile was a female; the others could not be sexed. The largest specimen was taken at 451–500 m at night in late spring. In late summer one postlarva was caught at 801–850 m during the day and another at the surface at night.

分布於東大西洋摩洛哥至安哥拉、東太平洋夏威夷附近以及西太平洋的東沙群島。

罕見魚種

體延長，側扁，後部略細。頭長形而大。吻短，前端略陡。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13，後部另具一脂鰭；臀鰭基底略等於背鰭基底，具軟條13；尾鰭叉形，尾鰭副鰭條堅硬。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)無；鼻部腹位發光器(Vn)小而圓形，周圍具黑色組織；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，均在眼眶下緣縱線之下；胸鰭上方發光器(PLO)，距側線比距胸鰭基部近；胸鰭下方發光器(PVO)2個，兩者互為垂直排列；胸部發光器(PO)5個，呈水平排列；腹部發光器(VO)3個，水平排列；腹鰭上位發光器(VLO)位於腹鰭和側線之間，較接近側線；臀鰭上方發光器(SAO)3個，三者排列呈角狀，SAO3在側線下緣；體後側位發光器(Pol)1個，在脂鰭下方，側線下緣；臀鰭前部發光器(AOa)3個，水平排列；臀鰭後部發光器(AOp)2個，均在INGL前方；尾鰭前位發光器(Prc)3個，前二個水平排列，Prc3在側線下緣。尾部發光腺SUGL略短於INGL，周圍具黑色組織。

大洋性中層巡游魚類，具日夜垂直分布習性，白天一般棲息深度可達800-2,000公尺左右，晚上則上游至水深1,000公尺附近處覓食，在冷水域可發現於300公尺左右，以小蝦等甲殼類為食。

43°N to 41°N in Canadian Atlantic

Found at depths of 800- 2000 m during day, and below 1000 m at night.

nektonic