The bearded angler’s scientific name, Linophryne arborifera, means “tree-bearing flax-toad” in Greek. The females in this species grow a bioluminescent lure on their heads, as well as a long, branchlike barbel on their lower jaw.
The males and females of this species are further proof that opposites attract. Females grow to a length of up to 225 millimeters, but males are full grown at about 30 millimeters. Males lack the eerie plumage sported by females, and they are also parasitic in nature, attaching themselves upside-down to females for a ride and to mate.