Freshwater

Paradise fish

Macropodus opercularis

This species exhibits sexual dimorphism. Males are larger than females and possess elongated filaments on their …

Perch, Yellow

Perca flavescens

Unlike the white perch, which is actually a temperate perch, the yellow perch is a true …

Peters's elephant-nose fish

Gnathonemus petersii

The elephantnose fish has a moderately deep, laterally compressed body with a distinctive sharp, funnel-shaped snout. …

Pickerel, Chain

Esox niger

With its long, slender body, chain pickerel resembles northern pike and muskellunge, especially when young. It …

Pike, Northern

Esox lucius

The northern pike has an elongated body and head. The snout is broad and flat, resembling …

Porous seasonal killifish

Cynolebias porosus

The Porous seasonal killifish has a fusiform (spindle-shaped) body that is laterally compressed. The snout is …

Predatory carp

Chanodichthys erythropterus

The predatory carp has a body structure typical of an active pelagic predator — streamlined, elongated, …

Red-bellied piranha

Pygocentrus nattereri

The red-bellied piranha has a short, deep body shape. Its cross-section is compressed.All piranhas have large …

Rudd

Scardinius erythrophthalmus

The rudd has a cylindrical shape and a deep body. It has a moderately forked tail …

Salmon, Atlantic

Salmo salar

Compared to its body size, the adult Atlantic salmon has a small head. Its body is …

Salmon, Chinook

Oncorhynchus tshawytscha

The body is elongated and somewhat compressed. The head is cone-shaped . It has a bluish …

Salmon, Chum

Oncorhynchus keta

The mouth is large, with the maxillary bone reaching backwards to the vertical of the posterior …

Salmon, Pink

Oncorhynchus gorbuscha

Pink salmon are known as "humpback" because of their distorted, extremely humped appearance, which is caused …

Sander

Sander lucioperca

There are 8-12 short, broad, brown-black horizontal stripes on the sides. The dorsal and caudal fins …

Sauger

Stizostedion canadense

The body of the sauger is slender and almost cylindrical, and the head is long and …

Shiner, Common

Luxilus cornutus

The common shiner is silvery with a deeply compressed body, a dark dorsal stripe, large eyes, …

Shiner, Golden

Notemigonus crysoleucas

The golden shiner has a deep, compressed body that is usually a golden yellow or brassy …

Shiner, Striped

Luxilus chrysocephalus

The striped shiner is a silvery, laterally compressed minnow with large eyes and a terminal mouth. …

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 …

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 …