American eel side view photo with black background

    American Eel

    Anguilla rostrata
    Photo of an aquatic isopod in an aquarium, crawling on a rock.

    Aquatic Pillbugs and Sowbugs (Aquatic Isopods)

    Freshwater members of the crustacean order Isopoda
    Black crappie, male in spawning colors, side view photo with black background

    Black Crappie

    Pomoxis nigromaculatus
    Blackspotted topminnow side view photo with black background

    Blackspotted Topminnow

    Fundulus olivaceus
    Blackstripe topminnow, male in spawning colors, side view photo with black background

    Blackstripe Topminnow

    Fundulus notatus
     Central mudminnow side view photo with black background

    Central Mudminnow

    Umbra limi
    exclamation mark

    Endangered

    Crystal darter side view photo with black background

    Crystal Darter

    Crystallaria asprella
    exclamation mark

    Endangered

    deertoe

    Deertoe

    Truncilla truncata
    Photograph of Ebonyshell freshwater mussel shell exterior view

    Ebonyshell

    Fusconaia ebena
    exclamation mark

    Endangered

    fatmucket

    Fatmucket

    Lampsilis siliquoidea
    fragile papershell

    Fragile Papershell

    Leptodea fragilis
    Monkey Face Mussel

    Freshwater Mussels

    Bivalve molluscs in order Unionoida
    giant floater

    Giant Floater

    Pygandon grandis
    Photo of several prosobranch pond snails crawling on a rock.

    Gilled Aquatic Snails (Prosobranch Pond Snails)

    Over 20 Missouri species in former subclass Prosobranchia
    Harlequin darter side view photo with black background

    Harlequin Darter

    Etheostoma histrio
    exclamation mark

    Endangered

    Photo of a deer fly larva, probably in a petri dish, on a gray background.

    Horse and Deer Fly Larvae

    Tabanus, Chrysops, and related genera
    No photo available

    Hydras

    Various species in the genus Hydra
    maple leaf

    Mapleleaf

    Quadrula quadrula
    Photograph of several mosquito larvae resting at water surface

    Mosquito Larvae

    There are about 50 species of mosquitoes in our state.
    mucket

    Mucket

    Actinonaias ligamentina
    pimpleback

    Pimpleback

    Quadrula pustulosa
    pink mucket

    Pink Mucket

    Lampsilis abrupta
    exclamation mark

    Endangered

    pistolgrip

    Pistolgrip (Buckhorn)

    Tritogonia verrucosa
    pond mussel

    Pond Mussel

    Ligumia subrostrata
    River carpsucker side view photo with black background

    River Carpsucker

    Carpiodes carpio
    round pigtoe

    Round Pigtoe

    Pleurobema sintoxia
    Photo of amphipod on a rock

    Scuds and Sideswimmers (Amphipods)

    Species in the crustacean order Amphipoda
    Shortnose gar side view photo with black background

    Shortnose Gar

    Lepisosteus platostomus
    spike

    Spike (Ladyfinger)

    Elliptio dilatata
    Spotted gar side view photo with black background

    Spotted Gar

    Lepisosteus oculatus
    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
    wartyback

    Wartyback

    Quadrula nodulata
    Photo of a single water strider

    Water Striders

    Aquarius remigis; also species in the genus Gerris
    White crappie male, side view photo with black background

    White Crappie

    Pomoxis annularis
    white heelsplitter

    White Heelsplitter

    Lasmigona complanata
    Zebra Mussel

    Zebra Mussel

    Dreissena polymorpha
    invasive icon

    Invasive