Noun | 1. | family Percidae - active freshwater fishes; true perches and pike perches fish family - any of various families of fish order Perciformes, order Percomorphi, Perciformes, Percomorphi - one of the largest natural groups of fishes of both marine and fresh water: true perches; basses; tuna perch - spiny-finned freshwater food and game fishes genus Perca, Perca - type genus of the Percidae genus Stizostedion, Stizostedion - pike-perches genus Percina, Percina - a genus of Percidae |