Freshwater

Pallid sturgeon

Scaphirhynchus albus

The pallid sturgeon has a distinctive, prehistoric appearance. Its body is elongated, nearly cylindrical, with a …

Peled

Coregonus peled

The peled can be easily distinguished from other whitefish by its terminal mouth, in which the …

Scaly osman

Diptychus maculatus

The body of the Scaly osman is fusiform (spindle-shaped), elongate, and shallow. The mouth is inferior …

Siberian sturgeon

Huso baerii

The Siberian sturgeon has a spindle-shaped body with several longitudinal rows of bumps. Its short, triangular …

Southern ninespine stickleback

Pungitius platygaster

The southern ninespine stickleback can be distinguished from its European relatives by the large flaps on …

Spotted lungfish

Protopterus dolloi

The spotted lungfish has a body very similar to that of an eel. It is elongated …

Sterba's corydoras

Corydoras sterbai

Compared to other species in the genus, Sterba's Corydoras has a relatively high body. There are …

Stonecat

Noturus flavus

Stonecats have an olive, yellowish, or slate-colored upper half of the body and are the only …

Sturgeon, Lake

Acipenser fulvescens

Lake sturgeon are somewhat torpedo-shaped, and the upper lobe of the caudal fin is longer than …

Sturgeon, Shovelnose

Scaphirhynchus platorinchus

The shovelnose sturgeon has a broad, flat head with an elongated shovel-like snout. There are four …

Sturgeon: Green Sturgeon

Acipenser medirostris

Sturgeon and paddlefish, best known for their black caviar, belong to the order Acipenseriformes, but at …

Sucker, White

Catostomus commersoni

White suckers have inconspicuous coloration, usually sparse shades of white, yellow, and pink. Adults have almost …

Sucker: Northern Redhorse

Maxostoma macrolepidotum

Suckers are most easily distinguished by their small mouths and large fleshy lips. They have no …

Sunfish, Longear

Lepomis megalotis

With its stocky body, the longear sunfish is not as shrunken as the bluegill or pumpkinseed, …

Sunfish, Mud

Acantharchus pomotis

It has a rectangular compressed body that is dark reddish brown on the back and light …

Sunfish, Redbreast

Lepomis auritus

The body of the redbreasted sunfish is deep and compressed, but rather elongated for a sunfish. …

Sunfish, Redear

Lepomis microlophus

Pale golden-green on top, the redear sunfish has a rounded shape and is compressed at the …

Weatherfish

Misgurnus fossilis

The body of the Weatherfish is elongated, slightly compressed at the sides and covered with fine …

West African lungfish

Protopterus annectens

The body of the West African lungfish is elongated, 9 to 15 times longer than the …

White-eye bream

Ballerus sapa

The body of the white-eye bream is compressed laterally and more elongated than that of its …

Yellow catfish

Tachysurus sinensis

The body of the Yellow catfish is elongated, lacks scales, and is covered in mucus. The …