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
    Image of a bighead carp

    Bighead Carp

    Hypophthalmichthys nobilis
    invasive icon

    Invasive

    Illustration of a male black crappie in spawning coloration.

    Black Crappie

    Pomoxis nigromaculatus
    Image of blue catfish

    Blue Catfish

    Ictalurus furcatus
    Color illustration of Cypress Minnow

    Cypress Minnow

    Hybognathus hayi
    exclamation mark

    Endangered

    fatmucket

    Fatmucket

    Lampsilis siliquoidea
    Image of a freshwater drum fish

    Freshwater Drum

    Aplodinotus grunniens
    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
    Photo of several prosobranch pond snails crawling on a rock.

    Gilled Aquatic Snails (Prosobranch Pond Snails)

    Over 20 Missouri species in former subclass Prosobranchia
    Gizzard Shad

    Gizzard Shad

    Dorosoma cepedianum
    Image of grass carp

    Grass Carp

    Ctenopharyngodon idella
    invasive icon

    Invasive

    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
    Illustration of a largemouth bass

    Largemouth Bass

    Micropterous salmoides
    lilliput

    Lilliput

    Toxolasma parvus
    No photo available

    Longnose Darter

    Percina nasuta
    exclamation mark

    Endangered

    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.
    paper pondshell

    Paper Pondshell (Paper Floater)

    Utterbackia imbecillis
    pistolgrip

    Pistolgrip (Buckhorn)

    Tritogonia verrucosa
    plain pocketbook

    Plain Pocketbook

    Lampsilis cardium
    pond mussel

    Pond Mussel

    Ligumia subrostrata
    Image of a river carpsucker

    River Carpsucker

    Carpiodes carpio
    Photo of amphipod on a rock

    Scuds and Sideswimmers (Amphipods)

    Species in the crustacean order Amphipoda
    Shortnose gar, image of head and front portion of body, swimming in an aquarium

    Shortnose Gar

    Lepisosteus platostomus
    Image of a spotted bass

    Spotted Bass

    Micropterus punctulatus
    illustration of a striped bass, side view

    Striped Bass

    Morone saxatilis
    Photo of a pink planarian on a rock.

    Turbellarians (Planarians; Free-Living Flatworms)

    Species in genera Dugesia, Planaria, etc.
    Photo of a single water strider

    Water Striders

    Aquarius remigis; also species in the genus Gerris
    Image of white crappie

    White Crappie

    Pomoxis annularis
    white heelsplitter

    White Heelsplitter

    Lasmigona complanata
    Image of a white sucker

    White Sucker

    Catostomus commersoni
    yellow sandshell

    Yellow Sandshell

    Lampsilis teres
    Zebra Mussel

    Zebra Mussel

    Dreissena polymorpha
    invasive icon

    Invasive