Humpback anglerfish

Humpback anglerfish
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Lophiiformes
Family: Melanocetidae
Genus: Melanocetus
Species: M. johnsonii
Binomial name
Melanocetus johnsonii
Günther, 1864

The humpback anglerfish or common black devil, Melanocetus johnsonii, is a deepsea anglerfish in the family Melanocetidae, found in tropical to temperate parts of all oceans at depths to 2,000 m (6,600 ft). Its length is up to 2.9 cm (1.1 in) for males and up to 18 cm (7.1 in) for females.

The male

Male humpback anglerfish are much smaller than the females, being no more than 3 cm (just over an inch) long, whereas the female typically reaches 18 cm (7 in) in length. Male humpback anglerfish remain free-swimming into adulthood. Despite being free-swimming, it does not feed and only attaches briefly to a female. which is not the case with other deepsea anglerfish: with these, males swim freely when young, but before reaching adulthood, the male fixes itself permanently to the rear of the female's body, living thereafter as a parasite of the female. The male's internal organs now atrophy as the fish shares the female's blood and becomes simply a sperm provider

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