Latin Name: Melanocetus johnsonii
Geographic Location: Worldwide
Depth: 4500 meters
Size: Females 18 cm, Males 3 cm

The Humpback Angler is a Black seadevil Angler fish of the family Melanocetidae found in tropical to temperate parts of all oceans. Black seadevils are named for their dark and menacing appearance. Black seadevils are round, soft and mostly scale-less, with small black eyes and an array of large, sharp, glassy fang-like teeth lining the jaws of its gaping mouth. Like other anglerfish, the Humpback Anglers possess a bioluminescent lure to entice prey towards its mouth. Humpback anglerfish are also sexually dimorphic. The females have large expandable stomachs which give a flabby appearance but allow them to swallow prey much larger than themselves; an important strategy in a low-food environment. The males do not have lures and unlike most anglers, they are not parasitic during reproduction. Attachment to the female is assumed to occur but is not permanent. Males are thought to outnumber females and mature much faster. In contrast with males, females are poor swimmers and spend most of their time motionless, waiting for unsuspecting prey to approach their lures. While adults have been trawled from abyssal depths, larvae appear to remain in the upper 100 m and gradually descend with maturity.