4-Letter Fish Starting with 'PA'

Any of several species of omnivorous freshwater fish in the subfamily Serrasalminae, native to South American rivers and characterized by their distinctive, remarkably human-like square teeth adapted for crushing nuts, seeds, and plant matter.

A marine fish of the angelfish family, particularly the French angelfish (Pomacanthus paru), native to the western Atlantic Ocean and characterized by its dark body with yellow-edged scales.