Photo of backswimmer, side view

    Backswimmers

    About 32 North American species in the family Notonectidae
    Illustration of a male black crappie in spawning coloration.

    Black Crappie

    Pomoxis nigromaculatus
    Illustration of a male bluegill

    Bluegill

    Lepomis macrochirus
    Image of a bowfin

    Bowfin

    Amia calva
    Image of a brook silverside

    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

    Channel Catfish

    Ictalurus punctatus
    Photo of two Chinese mystery snails, on a white background, with a ruler nearby for scale.

    Chinese Mystery Snail

    Cipangopaludina chinensis malleata (syn. Bellamya chinensis)
    invasive icon

    Invasive

    Photo of crane fly larva

    Crane Fly Larvae

    There are over 500 species of crane flies in North America.
    Color illustration of Cypress Minnow

    Cypress Minnow

    Hybognathus hayi
    exclamation mark

    Endangered

    Monkey Face Mussel

    Freshwater Mussels

    Bivalve molluscs in order Unionoida
    Image of a golden shiner

    Golden Shiner

    Notemigonus crysoleucas
    Image of hybrid striped bass or "wiper"

    Hybrid Striped Bass (Wiper; Whiterock Bass)

    Morone chrysops x M. saxatilis
    No photo available

    Hydras

    Various species in the genus Hydra
    lilliput

    Lilliput

    Toxolasma parvus
    Illustration of a male longear sunfish

    Longear Sunfish

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

    Midge Fly Larvae

    Nearly 1,100 species in North America
    Image of a northern rock bass

    Northern Rock Bass (Goggle-Eye)

    Ambloplites rupestris
    pink papershell

    Pink Papershell

    Potamilus ohiensis
    Image of a redear sunfish

    Redear Sunfish

    Lepomis microlophus
    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 northern, also called virile, crayfish.

    Virile Crayfish (Northern Crayfish)

    Faxonius virilis (formerly Oronectes virilis)
    Photo of a water nymph crayfish, side view of specimen carefully arranged against black background

    Water Nymph Crayfish

    Faxonius nais (formerly Orconectes nais)
    Image of white crappie

    White Crappie

    Pomoxis annularis
    Image of a white sucker

    White Sucker

    Catostomus commersoni