American eel side view photo with black background

    American Eel

    Anguilla rostrata
    brokenray

    Arkansas Brokenray

    Lampsilis reeveiana
    Arkansas darter, female, side view photo with black background

    Arkansas Darter

    Etheostoma cragini
    Photo of backswimmer, side view

    Backswimmers

    About 32 North American species in the family Notonectidae
    Bluegill male in spawning colors, side view photo with black background

    Bluegill

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

    Bryozoans (Moss Animals)

    Freshwater species in the phylum Bryozoa
    Common shiner side view photo with black background

    Common Shiner

    Luxilus cornutus
    Photo of crane fly larva

    Crane Fly Larvae

    There are over 500 species of crane flies in North America.
    Orangethroat darter male in spawning colors, side view photo with black background

    Darters

    Etheostoma, Percina, Ammocrypta, and Crystallaria spp.
    deertoe

    Deertoe

    Truncilla truncata
    elktoe

    Elktoe

    Alasmidonta marginata
    ellipse

    Ellipse and Bleedingtooth

    Venustaconcha ellipsiformis and V. pleasii
    fatmucket

    Fatmucket

    Lampsilis siliquoidea
    fragile papershell

    Fragile Papershell

    Leptodea fragilis
    Monkey Face Mussel

    Freshwater Mussels

    Bivalve molluscs in order Unionoida
    Photo of a golden crayfish viewed through the surface of creek water.

    Golden Crayfish

    Faxonius luteus (formerly Orconectes luteus)
    Golden shiner male, side view photo with black background

    Golden Shiner

    Notemigonus crysoleucas
    Goldeye side view photo with black background

    Goldeye

    Hiodon alosoides
    Green sunfish male, side view photo with black background

    Green Sunfish

    Lepomis cyanellus
    Greenside darter female, side view photo with black background

    Greenside Darter

    Etheostoma blennioides
    No photo available

    Hydras

    Various species in the genus Hydra
    Longear sunfish, spawning male, side view photo with black background

    Longear Sunfish

    Lepomis megalotis
    Southern redbelly dace male in spawning colors, side view photo with black background

    Minnows

    Notropis, Cyprinella, Hybognathus, Luxilus, and others
    monkeyface

    Monkeyface

    Quadrula metanevra
    Mooneye side view photo with black background

    Mooneye

    Hiodon tergisus
    mucket

    Mucket

    Actinonaias ligamentina
    Niangua darter female, side view photo with black background

    Niangua Darter

    Etheostoma nianguae
    exclamation mark

    Endangered

    Orangethroat darter female, side view photo with black background

    Orangethroat Darter

    Etheostoma spectabile
    pimpleback

    Pimpleback

    Quadrula pustulosa
    pink mucket

    Pink Mucket

    Lampsilis abrupta
    exclamation mark

    Endangered

    plain pocketbook

    Plain Pocketbook

    Lampsilis cardium
    pond mussel

    Pond Mussel

    Ligumia subrostrata
    Photograph of Purple Wartyback freshwater mussel shell exterior view
    Rainbow darter female side view photo with black background

    Rainbow Darter

    Etheostoma caeruleum
    Redear sunfish side view photo with black background

    Redear Sunfish

    Lepomis microlophus
    scaleshell

    Scaleshell

    Leptodea leptodon
    exclamation mark

    Endangered

    Snuffbox

    Snuffbox

    Epioblasma triquetra
    exclamation mark

    Endangered

    Spotted bass side view photo with black background

    Spotted Bass

    Micropterus punctulatus
    Threadfin shad side view photo with black background

    Threadfin Shad

    Dorosoma petenense
    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 sucker side view photo with black background

    White Sucker

    Catostomus commersonii