<Li> Gigantactinidae (whipnose seadevils) </Li> <Li> Linophrynidae (leftvent seadevils) </Li> <P> All anglerfish are carnivorous and are thus adapted for the capture of prey . Ranging in color from dark gray to dark brown, deep - sea species have large heads that bear enormous, crescent - shaped mouths full of long, fang - like teeth angled inward for efficient prey grabbing . Their length can vary from 20 cm (8.0 in) to over 1 m (3 ft) with weights up to 45 kg (100 lb). Frogfish and other shallow - water anglerfish species are ambush predators, and often appear camouflaged as rocks, sponges or seaweed . </P> <P> Most adult female ceratioid anglerfish have a luminescent organ called the esca at the tip of a modified dorsal ray (the illicium, or "fishing rod"). The organ has been hypothesized to serve the obvious purpose of luring prey in dark, deep - sea environments, but also serves to call males' attention to the females to facilitate mating . </P>

What is the size of a deep sea angler
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