frogfish . 1. teleósteo fish m. marino of the suborder of the Acantopterigios, which reaches a meter in length, with huge, round, flattened head and three upper appendages longer and movable, very large mouth, placed, as well as the eyes, at the top of the head, small and fusiform body, large pectoral fins, and small of the back and tail. It lacks scales, is dark on the back and white belly, and has around the edge of the body as a fleshy barbels.