Big rivers (Missouri and Mississippi)

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American eel side view photo with black background

American Eel

Anguilla rostrata

Photo of backswimmer, side view

Backswimmers

About 32 North American species in the family Notonectidae

Black crappie, male in spawning colors, side view photo with black background

Black Crappie

Pomoxis nigromaculatus

Bluegill male in spawning colors, side view photo with black background

Bluegill

Lepomis macrochirus

Brook silverside side view photo with black background

Brook Silverside

Labidesthes sicculus

Gray, speckled, translucent gelatinous blob cut in half to show structure

Bryozoans (Moss Animals)

Freshwater species in the phylum Bryozoa

Channel catfish side view photo with black background

Channel Catfish

Ictalurus punctatus

Photo of crane fly larva

Crane Fly Larvae

There are over 500 species of crane flies in North America.

deertoe

Deertoe

Truncilla truncata

elktoe

Elktoe

Alasmidonta marginata

fragile papershell

Fragile Papershell

Leptodea fragilis

Photo of a freshwater jellyfish

Freshwater Jellyfish

Craspedacusta sowerbii (syn. C. sowerbyi)

Monkey Face Mussel

Freshwater Mussels

Bivalve molluscs in order Unionoida

giant floater

Giant Floater

Pygandon grandis

Golden shiner male, side view photo with black background

Golden Shiner

Notemigonus crysoleucas

Green sunfish male, side view photo with black background

Green Sunfish

Lepomis cyanellus

No photo available

Hydras

Various species in the genus Hydra

Largemouth bass side view photo with black background

Largemouth Bass

Micropterous salmoides

lilliput

Lilliput

Toxolasma parvus

maple leaf

Mapleleaf

Quadrula quadrula

Photo of a midge fly larva crawling on a rock in an aquarium

Midge Fly Larvae

Nearly 1,100 species in North America

mucket

Mucket

Actinonaias ligamentina

Northern pike side view photo with black background

Northern Pike

Esox lucius

paper pondshell

Paper Pondshell (Paper Floater)

Utterbackia imbecillis

pimpleback

Pimpleback

Quadrula pustulosa

pink heelsplitter

Pink Heelsplitter

Potamilus alatus

pink papershell

Pink Papershell

Potamilus ohiensis

pistolgrip

Pistolgrip (Buckhorn)

Tritogonia verrucosa

plain pocketbook

Plain Pocketbook

Lampsilis cardium

threehorn wartyback

Threehorn Wartyback

Obliquaria reflexa

threeridge

Threeridge

Amblema plicata

Photo of a pink planarian on a rock.

Turbellarians (Planarians; Free-Living Flatworms)

Species in genera Dugesia, Planaria, etc.

wabash pigtoe

Wabash Pigtoe

Fusconaia flava

Photo of a collared water scavenger beetle showing back.

Water Scavenger Beetles

Beetles in the family Hydrophilidae

White crappie male, side view photo with black background

White Crappie

Pomoxis annularis

white heelsplitter

White Heelsplitter

Lasmigona complanata

yellow sandshell

Yellow Sandshell

Lampsilis teres