Freshwater

Least killifish

Heterandria formosa

Least killifish differ little in body shape from their closest relatives, the Poecilia. They have an …

Mango tilapia

Sarotherodon galilaeus

The mouth is small, with the lower jaw length being less than 1/3 of the total …

Mosquitofish

Gambusia affinis affinis

The male anal fin is modified and is an intermittent organ for introducing sperm into the …

Paddlefish

Polyodon spathula

The paddlefish is almost sharklike in appearance, and if you cut off its long paddle-like snout, …

Peled

Coregonus peled

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

Perch, White

Morone americana

The white perch has a deep, thin body that rises steeply upward from each eye to …

Pyrrhulina filamentosa

Pyrrhulina filamentosa

Pyrrhulina filamentosa has an elongated body with a large caudal fin, the upper lobe of which …

Redbelly tilapia

Coptodon zillii, tilapia zillii.

Large species with a dense build, narrow head and small strong jaws. The upper profile of …

Salmon, Sockeye

Oncorhynchus nerka

The slimmest and most streamlined of the Pacific salmon, which are elongated and somewhat compressed from …

Shad, Alabama

Alosa alabamae

It has a large terminal mouth with upper and lower jaws of almost equal length. The …

Shad, American

Alosa sapidissima

The laterally compressed, rather deep body of the American shad is silvery white, with some amount …

Shad, Gizzard

Dorosoma cepedianum

The gizzard shad is one of two freshwater members of the herring family that has a …

Shad, Hickory

Alosa mediocris

Gray-green on the back and transitioning to silver on the sides, the hickory shad has transparent …

Shad, Threadfin

Dorosoma petenense

The threadfin shad has a silvery color and a deeply compressed body, most easily recognized by …

Shiner, Emerald

Notropis atherinoides

The Emerald Shiner is a slender, elongated fish with a pale silvery slate body that is …

Siamese fighting fish

Betta splendens

The body of the Siamese fighting fish is oval, flattened at the sides and elongated in …

Silver carp

Hypophthalmichthys molitrix

The body of the silver carp is quite deep, moderately elongated, and covered with small, easily …

Southern ninespine stickleback

Pungitius platygaster

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

Sterba's corydoras

Corydoras sterbai

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

Sumatra barb

Puntigrus tetrazona

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

Three spot gourami

Trichopodus trichopterus

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

Transcaspian marinka

Schizothorax pelzami, schizothorax raulinsii

The Transcaspian marinka has very small scales and a characteristic body coloration. The lateral line has …

Weatherfish

Misgurnus fossilis

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

Zebrafish

Danio rerio

The body shape of the zebrafish is fusiform, with compressed lateral sides and a superiorly oriented …