(n.) A fabled marine creature, typically represented as having the upper part like that of a woman, and the lower like a fish; a sea nymph, sea woman, or woman fish.

Davy Davy Jones Dylan Neptune Nereid Nereus Oceanid Oceanus Poseidon Thetis Triton Varuna bather bathing beauty bathing girl diver fresh-water nymph frogman kelpie limniad man fish merman naiad natator nix nixie ocean nymph sea devil sea god sea nymph sea-maid sea-maiden seaman siren swimmer undine water god water spirit water sprite