Photo of an alderfly larva among rocks and gravel in an aquarium.

    Alderfly Larvae

    Sialis spp.
    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
    Photo of a spotted fishing spider perched on the water's surface amid floating duckweed plants

    Aquatic Spiders

    Dolomedes spp., Tetragnatha spp., and others
    Photo of backswimmer, side view

    Backswimmers

    About 32 North American species in the family Notonectidae
    Bigmouth buffalo side view photo with black background

    Bigmouth Buffalo

    Ictiobus cyprinellus
    Black buffalo side view photo with black background

    Black Buffalo

    Ictiobus niger
    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
    Brown trout female side view photo with black background

    Brown Trout

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

    Bryozoans (Moss Animals)

    Freshwater species in the phylum Bryozoa
    Photo of caddisfly larva with case made of detritus

    Caddisfly Larvae

    Various species in the order Trichoptera
    Chestnut lamprey side view photo with black background

    Chestnut Lamprey

    Ichthyomyzon castaneus
    Common carp side view photo with black background

    Common Carp

    Cyprinus carpio
    invasive icon

    Invasive

    Photo of crane fly larva

    Crane Fly Larvae

    There are over 500 species of crane flies in North America.
    Photo of a spothanded crayfish viewed from above on white background.

    Crayfishes

    About 36 species in Missouri
    Photo of a damselfly nymph on rocks in an aquarium.

    Damselfly Larvae

    Species in the suborder Zygoptera
    Photo of a dragonfly larva resting on a stone.

    Dragonfly Larvae

    Species in the suborder Anisoptera
    fatmucket

    Fatmucket

    Lampsilis siliquoidea
    Photo of a fishfly larva crawling among rocks in an aquarium.

    Fishfly Larvae

    Chauliodes, Neohermes, and Nigronia spp. (in eastern US)
    Monkey Face Mussel

    Freshwater Mussels

    Bivalve molluscs in order Unionoida
    giant floater

    Giant Floater

    Pygandon grandis
    Photo of a giant water bug

    Giant Water Bugs

    Species in the genera Abedus, Belostoma, and Lethocerus
    Venomous Icon

    Venomous

    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 side view photo with black background

    Gizzard Shad

    Dorosoma cepedianum
    Golden shiner male, side view photo with black background

    Golden Shiner

    Notemigonus crysoleucas
    Grass pickerel side view photo with black background

    Grass Pickerel

    Esox americanus
    Green sunfish male, side view photo with black background

    Green Sunfish

    Lepomis cyanellus
    Photo of hellgrammite

    Hellgrammite

    Corydalus cornutus
    Highfin carpsucker breeding male side view photo with black background

    Highfin Carpsucker

    Carpiodes velifer
    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
    Photo of a horsehair worm in an aquarium

    Horsehair Worms

    About 350 species scientifically described.
    Hybrid striped bass, or wiper, side view photo with black background

    Hybrid Striped Bass (Wiper; Whiterock Bass)

    Morone chrysops x M. saxatilis
    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
    Logperch side view photo with black background

    Logperch

    Percina caprodes
    Longear sunfish, spawning male, side view photo with black background

    Longear Sunfish

    Lepomis megalotis
    Longnose darter side view photo with black background

    Longnose Darter

    Percina nasuta
    exclamation mark

    Endangered

    Longnose gar side view photo with black background

    Longnose Gar

    Lepisosteus osseus
    Photo of a longpincered crayfish.

    Longpincered Crayfish

    Faxonius longidigitus (formerly Orconectes longidigitus)
    Photo of pulmonate snail crawling on rock

    Lunged Aquatic Snails (Pulmonate Pond Snails)

    Over 30 Missouri species in former subclass Pulmonata
    Photo of a mayfly naiad crawling on rock underwater

    Mayfly Larvae

    There are hundreds of species in North America.
    Photo of a midge fly larva crawling on a rock in an aquarium

    Midge Fly Larvae

    Nearly 1,100 species in North America
    Photograph of several mosquito larvae resting at water surface

    Mosquito Larvae

    There are about 50 species of mosquitoes in our state.
    Northern rock bass, or goggle-eye, side view photo with black background

    Northern Rock Bass (Goggle-Eye)

    Ambloplites rupestris
    pink heelsplitter

    Pink Heelsplitter

    Potamilus alatus
    pink papershell

    Pink Papershell

    Potamilus ohiensis
    pistolgrip

    Pistolgrip (Buckhorn)

    Tritogonia verrucosa
    plain pocketbook

    Plain Pocketbook

    Lampsilis cardium
    pond mussel

    Pond Mussel

    Ligumia subrostrata

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