Photo of backswimmer, side view

    Backswimmers

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

    Bowfin

    Amia calva
    Brook silverside side view photo with black background

    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 side view photo with black background

    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.
    Cypress minnow side view photo with black background

    Cypress Minnow

    Hybognathus hayi
    exclamation mark

    Endangered

    fatmucket

    Fatmucket

    Lampsilis siliquoidea
    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
    Golden shiner male, side view photo with black background

    Golden Shiner

    Notemigonus crysoleucas
    Green sunfish male, side view photo with black background

    Green Sunfish

    Lepomis cyanellus
    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
    Longear sunfish, spawning male, side view photo with black background

    Longear Sunfish

    Lepomis megalotis
    maple leaf

    Mapleleaf

    Quadrula quadrula
    Photo of a midge fly larva crawling on a rock in an aquarium

    Midge Fly Larvae

    Nearly 1,100 species in North America
    Muskellunge side view photo with black background

    Muskellunge

    Esox masquinongy
    Northern pike side view photo with black background

    Northern Pike

    Esox lucius
    Northern rock bass, or goggle-eye, side view photo with black background

    Northern Rock Bass (Goggle-Eye)

    Ambloplites rupestris
    paper pondshell

    Paper Pondshell (Paper Floater)

    Utterbackia imbecillis
    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
    Redear sunfish side view photo with black background

    Redear Sunfish

    Lepomis microlophus
    Spotted bass side view photo with black background

    Spotted Bass

    Micropterus punctulatus
    Striped bass side view photo with black background

    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)
    Photo of a collared water scavenger beetle showing back.

    Water Scavenger Beetles

    Beetles in the family Hydrophilidae
    White crappie male, side view photo with black background

    White Crappie

    Pomoxis annularis
    white heelsplitter

    White Heelsplitter

    Lasmigona complanata
    White sucker side view photo with black background

    White Sucker

    Catostomus commersoni
    yellow sandshell

    Yellow Sandshell

    Lampsilis teres