Freshwater

Siberian sturgeon

Huso baerii

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

Slender piranha

Serrasalmus elongatus

The most important feature of the slender piranha, which is reflected in its name, is its …

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 …

Snook: Fat Snook, Swordspine Snook, Tarpon Snook

Centropomus parallelus, Centropomus ensiferus, Centropomus pectinatus

The fat snook has a deeper body than other snook, although it is not severely compressed. …

Speckled peacock bass

Cichla temensis

Speckled peacock bass has dark spots on the operculum and three distinctive vertical black stripes on …

Splake

Salvelinus namaycush x Salvelinus fontinalis

Splake are difficult to identify externally as they resemble both parents. The body shape is intermediate …

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 …

Steelhead

Oncorhynchus mykiss

Steelhead are usually slender and streamlined. The dorsal coloration is mostly blue-green with an olive hue, …

Striped snakehead

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

Sturgeon, Atlantic

Acipenser oxyrinchus

The Atlantic sturgeon is dark brown or olive green with a white belly. The head is …

Sturgeon, White

Acipenser transmontanus

The adult white sturgeon has a moderately blunt snout, spines closer to the tip of the …

Taranets char

Salvelinus taranetzi

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

Tarpon

Megalops atlanticus

The body of the tarpon is elongated and contracted, covered with large major scales and a …

Three-spined stickleback

Gasterosteus aculeatus

The Three-spined Stickleback has an elongated body that is compressed from the sides. The tail stalk …

Trout-Perch

Percopsis omiscomaycus

The trout-perch gets its name from its superficial resemblance to trout, as it has a fat …

Trout, Apache

Oncorhynchus apache

The Apache trout is a bright fish with yellow to golden flanks, a fat fin, and …

Trout, Blueback

Salvelinus alpinus oquassa

The landlocked or non-anadromous member of the charr family has been reclassified as the subspecies Arctic …

Trout, Brook

Salvelinus fontinalis

Brook trout have such unique coloration and patterns that they are rarely confused with other fish, …

Trout, Brown

Salmo trutta

The brown trout gets its common name from its characteristic olive green, brown or golden brown …

Trout, Cutthroat

Oncorhynchus clarki

It is a very variable fish, both in coloration and size. The characteristic feature that gave …

Trout, Gila

Oncorhynchus gilae

The Gila trout, a member of the Salmonidae family, is an olive to copper-colored fish with …