- A division of fishes like the perches and relevant sorts.
- In. Cope's ichthyological system (1870), an order of physoclistous fishes, aided by the ventral fins thoracic or jugular, skull typical, bones of jaws distinct, and substandard pharyngeals individual. It hence includes most a canthopterygian fishes.
- one of several biggest all-natural groups of fishes of both marine and fresh-water: real perches; basses; tuna