Freshwater

Balkhash perch

Perca schrenkii

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

Bass, Largemouth

Micropterus salmoides

Compared to other members of the sunfish family, the largemouth bass has an elongated and robust …

Bass, Redeye

Micropterus coosae

Redeye bass is distinguished by a significant amount of red coloration in its eyes. It is …

Bass, Roanoke

Ambloplites cavifrons

Roanoke bass is similar in body shape to rock bass or warmouth. It can be recognized …

Bass, Rock

Ambloplites rupestris

Although in appearance it resembles something between a bluegill and a black bass, the rock bass …

Bass, Smallmouth: Northern Smallmouth Bass, Neosho Smallmouth Bass

Micropterus dolomieui, Micropterus dolomieui dolomieui, Micropterus dolomieui velox

The smallmouth bass has a strong, slightly laterally compressed and elongated body, a protruding lower jaw, …

Bass, Spotted

Micropterus punctulatus

Spotted bass has a moderately compressed, elongated body with similar coloration and markings to those of …

Bass, White

Morone chrysops

White bass has a moderately deep and compressed body, which is elevated behind a small head …

Big Baikal oilfish

Comephorus baikalensis

The body of the Big Baikal oilfish is slender, naked (devoid of scales), with very thin …

Black tetra

Gymnocorymbus ternetzi

The black tetra has a flat, tall body.

Bluegill

Lepomis macrochirus

The bluegill has a considerably compressed oval or rounded body, a small mouth, and a small …

Cardinal tetra

Paracheirodon axelrodi

The Cardinal tetra has an elongated body that is slightly flattened on the sides. The females …

Crappie, Black

Pomoxis nigromaculatus

The black crappie and white crappie are similar in colour, ranging from silvery olive to bronze …

Crappie, White

Pomoxis annularus

White crappie and black crappie are the same colour, ranging from silvery olive to bronze with …

Darters: Johnny Darter

Etheostoma nigrum

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

European perch

Perca fluviatilis

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

Fourspine stickleback

Apeltes quadracus

The fourspine stickleback possesses an elongated, fusiform body lacking scales. Typically, it exhibits four or five …

Golden pencilfish

Nannostomus beckfordi

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

Herring, Pacific

Clupea pallasii

The body is prostrate, compressed from the sides, covered with easily drooping scales. Abdomen rounded, ventral …

One-lined pencilfish

Nannostomus unifasciatus

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

Perch, White

Morone americana

The white perch has a deep, thin body that rises steeply upward from each eye to …

Perch, Yellow

Perca flavescens

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

Piraya

Pygocentrus piraya

The piraya has a laterally compressed, roughly circular profile typical of piranhas. A distinctive feature is …

Pyrrhulina filamentosa

Pyrrhulina filamentosa

Pyrrhulina filamentosa has an elongated body with a large caudal fin, the upper lobe of which …