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

    Bryozoans (Moss Animals)

    Freshwater species in the phylum Bryozoa
    Photo of a male Banded Pennant dragonfly

    Dragonflies

    Species in the suborder Anisoptera
    elephant's ear

    Elephantear

    Elliptio crassidens
    exclamation mark

    Endangered

    image of a Summer Fishfly

    Fishflies

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

    Freshwater Mussels

    Bivalve molluscs in order Unionoida
    giant floater

    Giant Floater

    Pygandon grandis
    Image of a giant red-headed centipede.

    Giant Red-Headed Centipede

    Scolopendra heros
    Venomous Icon

    Venomous

    Photo of a leech

    Leeches

    Various species in the subclass Hirudinea
    Photo of a longpincered crayfish.

    Longpincered Crayfish

    Faxonius longidigitus (formerly Orconectes longidigitus)
    image of Narceus Millipede crawling across gravel

    Millipedes

    More than 900 species in North America north of Mexico
    Photo of a ringed crayfish.

    Ringed Crayfish

    Faxonius neglectus (formerly Orconectes neglectus)
    image of a Carolina Grasshopper

    Short-Horned Grasshoppers

    About 620 species in North America
    Photo of a spothanded crayfish viewed through creekwater.

    Spothanded Crayfish

    Faxonius punctimanus (formerly Orconectes punctimanus)
    Photo of a pink planarian on a rock.

    Turbellarians (Planarians; Free-Living Flatworms)

    Species in genera Dugesia, Planaria, etc.