1) Active freshwater fishes 2) Family percidae 3) Fish family 
The Percidae are a family of perciform fish found in fresh and brackish waters of the Northern Hemisphere. The majority are Nearctic, but there are also Palearctic species. The family contains about 200 species in 10 genera. The darters, perches, and their relatives are in this family; well-known species include the walleye, sauger, ruffe, and thr...
[n] - active freshwater fishes
family Percidae noun active freshwater fishes; true perches and pike perches