| Noun | 1. | Percoidea - in some classifications nearly or exactly equivalent to the Perciformes which are considered a suborder animal order - the order of animals order Perciformes, order Percomorphi, Perciformes, Percomorphi - one of the largest natural groups of fishes of both marine and fresh water: true perches; basses; tuna family Sillaginidae, Sillaginidae - small family of small food fishes in shallow waters of the Pacific around Indonesia |