perch: any of numerous spiny-finned fishes of various families of the order Perciformes
percoid fish: any of numerous spiny-finned fishes of the order Perciformes
rosidae: a group of trees and shrubs and herbs mostly with polypetalous flowers; contains 108 families including Rosaceae; Crassulaceae; Myrtaceae; Melastomaceae; Euphorbiaceae; Umbelliferae