Freshwater

Freshwater fish spend part or all of their lives in fresh water, such as rivers and lakes, with a salinity of less than 1.05%.

Showing 1–8 of 8

Perca schrenkii

The closest relative is the European perch (Perca fluviatilis), from which the Balkhash perch diverged approximately …

Etheostoma nigrum

There are three known genera of darters: Percina, which contains about 40 species: Etheostoma, which contains …

Perca fluviatilis

The European perch has a laterally compressed body covered with dense, small ctenoid scales. It has …

Perca flavescens

Unlike the white perch, which is actually a temperate perch, the yellow perch is a true …

Gymnocephalus cernuus

The ruffe is very similar to the yellow perch in body shape and to the walleye …

Sander lucioperca

There are 8-12 short, broad, brown-black horizontal stripes on the sides. The dorsal and caudal fins …

Stizostedion canadense

The body of the sauger is slender and almost cylindrical, and the head is long and …

Stizostedion vitreum

Walleye have a slender cylindrical body with a conical head. The first dorsal fin has sharp …