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Humpback Anglerfish (Melanocetus johnsonii) - Wiki
Subject: Humpback Anglerfish (Melanocetus johnsonii) - Wiki
Humpback Anglerfish (Melanocetus johnsonii).jpg
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Humpback Anglerfish (Melanocetus johnsonii) - Wiki

Humpback anglerfish
From Wikipedia, the free encyclopedia

[Photo] Humpback anglerfish, Melanocetus johnsonii. From plate 120 of Oceanic Ichthyology by G. Brown Goode and Tarleton H. Bean, published 1896.

The humpback angler, Melanocetus johnsonii, is a black seadevil of the family Melanocetidae, found in tropical to temperate parts of all oceans at depths of up to 2,000 m. Its length is up to 3 cm for males and up to 20 cm for females.

Female humpback anglers have an enormous head dominated by a cavernous mouth full of long slender teeth that can fold backwards when prey is being swallowed. The belly is distensible and this, along with the huge gape of the mouth, allows them to swallow fishes up to twice their own length. Their eyes are small and covered by a thin layer of skin, and between them arises a large lure which is actually a modified first dorsal fin ray.

Males are free swimming when young but before they mature these small fishes (about a tenth the size of the female) attach themselves permanently to the hind body of the female and become parasitic. Their blood supply becomes continuous with that of the female and most of the internal organs degenerate: they become simply appendages to supply sperm when required.
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Humpback angler
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