Noun | 1. | ![]() 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 blennioid, blennioid fish - elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins Blenniidae, family Blenniidae - a family of fish including: combtooth blennies Clinidae, family Clinidae - viviparous blennies of temperate and tropical seas family Stichaeidae, Stichaeidae - pricklebacks Anarhichadidae, family Anarhichadidae - wolffishes family Zoarcidae, Zoarcidae - eelpouts |