The male corresponding to mermaid; a sea man, or man fish.

half man and half fish; lives in the sea

a dwarf that lives in the sea

a fabled marine creature with the head and upper body of a man and the tail of a fish

Mermen are mythical male legendary creatures who are human from the waist up and fish-like from the waist down, whose s were their female counterparts, the more commonly known mermaids. In Greek mythology, mermen were often illustrated to have green seaweed-like hair, a beard, and a trident.