Percidae

The Percidae are a family of ray-finned fish, part of the order Perciformes, which are found in fresh and brackish waters of the Northern Hemisphere. The majority are Nearctic, but there are also Palearctic species. The family contains nearly 250 species in 12 genera. The perches and their relatives are in this family; well-known species include the walleye, sauger, ruffe, and three species of perch. However, small fish known as darters are also a part of this family.

Gymnocephalus is a genus of ray-finned fishes from the family Percidae, which includes the perches, pike-perches and darters. They are from the Western Palearctic area, although one species, Gymnocephalus cernua has been accidentally introduced to the Great Lakes region where it is regarded as an invasive species. They have the common name "ruffe" and resemble the true perches in the genus Perca, but are usually smaller and have a different pattern.

Percarina is a genus of ray-finned fish in the family Percidae found in eastern Europe. They are characterised by having the first dorsal fin, having 9–11 spines and being widely separated from the second dorsal fin.

species of fish

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Mioplosus is an extinct genus of lates perches that lived from the early to middle Eocene (about 56 to 33.9 million years ago). Five species of the genus has been described, Mioplosus labracoides is found in the Green River Formation Lagerstätte.