Freshwater

African brown knifefish

Xenomystus nigri

The body of this fish is unusual: it is flattened ventrolaterally and elongated, giving it a …

Alaska blackfish

Dallia pectoralis

The Alaska blackfish can be identified by its short, flattened snout, the posterior position of the …

Amu-Darya trout

Salmo oxianus

The Amu-Darya trout, in its external appearance, is typical of salmonid fish but has its own …

Aral Basin snowtrout

Schizothorax intermedius

The Aral Basin snowtrout has a fusiform (spindle-shaped) body. The head is flat on the upper …

Arapaima

Arapaima gigas

The body of the arapaima is elongated and compressed from the sides. It is covered with …

Arctic lamprey

Lethenteron camtschaticum

The Arctic lamprey is characterized by its eel-like body shape, the presence of two large teeth …

Asian stinging catfish

Heteropneustes fossilis

The Asian stinging catfish has an elongated, slightly compressed body that writhes like a snake when …

Atlantic stingray

Dasyatis sabina

The Atlantic stingray has an elongated, pointed snout. Spiracles are located behind the eyes. The ventral …

Blue leopard corydoras

Corydoras paleatus

The Blue Leopard Corydoras has a strongly curved back line and an almost flat abdomen. Its …

Bowfin

Amia calva

The ancient fish, described by some as looking more like a snake than a fish, has …

Brazhnikov's catfish

Tachysurus brashnikowi

Brazhnikov's catfish belongs to the family Bagridae (bagrid catfishes). The species is a demersal fish, meaning …

Brook lamprey

Lampetra planeri

The brook lamprey has an elongated, eel-like (anguilliform) body that is completely scaleless. It is the …

Bullhead, Black

Ameiurus melas

The "black" bullhead can actually be yellowish green, dark green, olive, brown, or black on the …

Bullhead, Brown

Ameiurus nebulosus

The head of the brown bullhead is large for its round and slender body, and the …

Bullhead, Yellow

Ameiurus natalis

A moderately slender fish, it has skin without scales. The coloration varies from yellowish-olive to brown …

Burbot

Lota lota

The head is flattened, broad, with an unpaired antenna on the chin and short antennae at …

Bushymouth catfish

Ancistrus dolichopterus

The Bushymouth catfish has a flattened body that is completely covered in polygonal bony plates. Its …

Campylomormyrus curvirostris

Campylomormyrus curvirostris, gnathonemus curvirostris, campylomormyrus rhynchophorus.

The snout of Campylomormyrus curvirostris is highly elongated and curved downward like a trunk, with a …

Campylomormyrus numenius

Campylomormyrus numenius

Campylomormyrus numenius possesses a highly elongated, ventrally curved rostrum, analogous to an elephant's trunk, terminating in …

Candiru

Vandellia cirrhosa

The candiru has an elongated body, a small head, and an abdomen that may appear swollen, …

Cascarudo

Callichthys callichthys

Cascarudo has an elongated, slightly flattened body covered with two rows of bony plates. It has …

Catfish, Blue

Ictalurus furcatus

Blue catfish are usually bluish-grey or slate-blue, without spots or other markings, although they can be …

Catfish, Channel

Ictalurus punctatus

The body is bare, elongated, slender and compressed at the rear. The caudal fin is long …

Catfish, Flathead

Pylodictus olivaris

The flathead catfish has a distinctive appearance and is not easily confused with any other species. …