Source : Webster's Revised Unabridged Dictionary (1913)

Perciformes \Per`ci*for"mes\, n. pl. [NL.] (Zo["o]l.)
   An extensive tribe or suborder of fishes, including the true
   perches ({Percid[ae]}); the pondfishes ({Centrarchid[ae]});
   the sci[ae]noids ({Sci[ae]nid[ae]}); the sparoids
   ({Sparid[ae]}); the serranoids ({Serranid[ae]}), and some
   other related families.

Source : WordNet®

Percidae
     n : active freshwater fishes; true perches and pike perches
         [syn: {family Percidae}]