belonging to the Percoidea, a group of acanthopterygian fishes comprising the true perches and related families, and constituting one of the largest natural groups of fishes.
per·coid (pûr'koid') adj. Of or relating to the Percoidea, a large suborder of spiny-finned fishes that includes the perches, sunfishes, groupers, and grunts. n. A fish belonging to the suborder Percoidea.
[From New Latin Percoīdea, suborder name : Latin perca, perch; see perch2 + New Latin -oīdea, pl. of -oīdēs, resembling (from Greek -oeidēs; see -oid).]