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 1–12 of 12

Anoptichthys jordani

Astyanax jordani is very close to A. mexicanus and their taxonomic affiliation is controversial. Some consider …

Rhinichthys atratulus

The blacknose dace has a long, slender body with a slightly protruding snout. The whiskers, characteristic …

Etheostoma nigrum

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

Nannostomus beckfordi

The genus name Nannostomus comes from the Latin nannus ("small") and the Greek stoma ("mouth"), referring …

Mugil cephalus, Mugil curema

The striped mullet (Mugil cephalus) has a bluish-gray or green coloration along the back, turning to …

Nannostomus unifasciatus

The name unifasciatus comes from the Latin words uni ("one") and fasciatus ("banded"), meaning "one-banded." The …

Gymnocephalus cernuus

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

Lepomis gibbosus

Each species has coarse scales and two united dorsal fins, the first of which is strongly …

Nannostomus trifasciatus

The genus name Nannostomus comes from the Greek nannos ("dwarf") and the Latin stomus ("mouth"), referring …

Coregonus clupeaformis

A slender, elongated species, the lake whitefish is silvery white with an olive or pale greenish-brown …

Prosopium williamsoni

The mountain whitefish is long, slender, and almost cylindrical, though not quite the same as the …

Prosopium cylindraceum

The Cod Whitefish is mostly silver with a dark brown to almost bronze coloration with a …