| Noun | 1. | Mugiloidea - fishes distinguished by abdominal pelvic fins: families Mugilidae; Atherinidae; Sphyraenidae 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 Mugilidae, Mugilidae - grey mullets Atherinidae, family Atherinidae - small spiny-finned fishes of both salt and fresh water family Sphyraenidae, Sphyraenidae - monotypic family of large active fishes of tropical and subtropical waters: barracuda |