Freshwater

African jewelfish

Hemichromis bimaculatus

The body of the African jewelfish is elongated and tall, the sides are flat.

Amur bitterling

Rhodeus sericeus

The Amur bitterling is a small fish with a deep, laterally compressed body, large scales, and …

Arctic grayling

Thymallus arcticus

The Arctic grayling has 58 to 62 vertebrae. They have small mouths with small teeth on …

Asp

Leuciscus aspius

The asp is a true "torpedo-shaped" predator, whose appearance reveals it as a swift hunter.The body …

Astyanax jordani

Anoptichthys jordani

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

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 …

Bering cisco

Coregonus laurettae

The Bering cisco has an elongated, compressed body. It is distinguished from the Arctic cisco (Coregonus …

Big Baikal oilfish

Comephorus baikalensis

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

Black Molly

Poecilia sphenops

The Black Molly has an elongated body. Females tend to be more rounded in appearance. The …

Black tetra

Gymnocorymbus ternetzi

The black tetra has a flat, tall body.

Blotched upside-down catfish

Synodontis nigriventris

Body stocky, slightly flattened at the sides. Back more convex than abdomen, eyes large, mouth lower …

Bluegill

Lepomis macrochirus

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

Broad whitefish

Coregonus nasus

The Broad Whitefish has a broad, compressed body. Its nose is thick and humped, protruding behind …

Buffalo, Smallmouth

Ictiobus bubalus

A deep-bodied and compressed fish, the smallmouth buffalo has a small conical head, a high back, …

Cardinal tetra

Paracheirodon axelrodi

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

Charr, Arctic

Salvelinus alpinus

Like all members of the genus Salvelinus, the Arctic charr has bright spots on the body, …

Chub

River chub is an olive-coloured fish with a strong body, large scales and light yellow to …