Freshwater

Smallscale archerfish

Toxotes microlepis

The smallscale archerfish has a pointed snout and large eyes. Their back is relatively flat and …

Smelt, Rainbow

Osmerus mordax

A slender, silvery fish with a pale green or olive green back. When fresh, the sides …

Snook, Common

Centropomus undecimalis

A silvery fish with a yellow-green or olive hue, it has a streamlined and slender body …

Southern ninespine stickleback

Pungitius platygaster

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

Spined loach

Cobitis taenia

The spined loach has a long, slender body, slightly compressed laterally, which helps it move easily …

Spotted lungfish

Protopterus dolloi

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

Squawfish, Northern

Ptychocheilus oregonensis

The mouth of the northern squawfish is terminal and large, extending backward beyond the anterior margin …

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 …

Stoneroller, Central

Campostoma anomalum

The Central Stoneroller has a thick and poorly compressed torpedo-shaped body of dull gray color with …

Striped headstander

Anostomus anostomus

The body of the striped headstander is elongated, slightly compressed laterally, resembling a torpedo. The head …

Striped snakehead

It is a bony fish with an endoskeletal thorax. Body subcylindrical, head depressed, caudal fin rounded. …

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 …

Sumatra barb

Puntigrus tetrazona

These barbs have tall, strongly compressed bodies. There are no whiskers. Females are larger than males …

Sunfish, Green

Lepomis cyanellus

Latin name Lepomis cyanellus Other names Green perch, black perch, pond perch, creek perch, sand bass, …

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, Pumpkinseed

Lepomis gibbosus

A brilliantly colored fish, the adult pumpkinseed is olive green with blue and orange spots and …

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 …

Sunfish: Pumpkinseed Sunfish

Lepomis gibbosus

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

Taranets char

Salvelinus taranetzi

This species is very similar to the Arctic char. Taranets char have a low, flattened body …

Three spot gourami

Trichopodus trichopterus

In terms of body shape and fin structure, the fish resembles the pearl gourami, but its …