Photo of a coldwater crayfish.

    Coldwater Crayfish

    Faxonius eupunctus (formerly Orconectes eupunctus)
    Photo of a spothanded crayfish viewed from above on white background.

    Crayfishes

    About 36 species in Missouri
    elephant's ear

    Elephantear

    Elliptio crassidens
    exclamation mark

    Endangered

    ellipse

    Ellipse and Bleedingtooth

    Venustaconcha ellipsiformis and V. pleasii
    Monkey Face Mussel

    Freshwater Mussels

    Bivalve molluscs in order Unionoida
    Photo of Hubbs' crayfish.

    Hubbs’ Crayfish

    Cambarus hubbsi
    Photo of a leech

    Leeches

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

    Longpincered Crayfish

    Faxonius longidigitus (formerly Orconectes longidigitus)
    Photo of a Mammoth Spring crayfish.

    Mammoth Spring Crayfish

    Faxonius marchandi (formerly Orconectes marchandi)
    Photo of an Ozark crayfish.

    Ozark Crayfish

    Faxonius ozarkae (formerly Orconectes ozarkae)
    Photo of a painted devil crayfish standing on a sandy substrate

    Painted Devil Crayfish

    Lacunicambarus ludovicianus
    pink mucket

    Pink Mucket

    Lampsilis abrupta
    exclamation mark

    Endangered

    Photo of a ramshorn snail on a wet rock.

    Ramshorn Snails

    Gyraulus, Helisoma, Menetus, Micromenetus, Planorbula spp.
    Photo of a ringed crayfish.

    Ringed Crayfish

    Faxonius neglectus (formerly Orconectes neglectus)
    round pigtoe

    Round Pigtoe

    Pleurobema sintoxia
    Photo of a saddleback crayfish.

    Saddleback Crayfish

    Faxonius medius (formerly Orconectes medius)
    Photo of a spothanded crayfish viewed through creekwater.

    Spothanded Crayfish

    Faxonius punctimanus (formerly Orconectes punctimanus)
    Photo of an aquatic tubificid worm among rocks in an aquarium.

    Tubificid Worms (Tubifex Worms)

    Tubifex spp. and other aquatic tubificid annelids
    Photo of a vernal crayfish.

    Vernal Crayfish

    Procambarus viaeviridus
    Photo of a northern, also called virile, crayfish.

    Virile Crayfish (Northern Crayfish)

    Faxonius virilis (formerly Oronectes virilis)
    Water springtails congregate in water above soggy dead leaves

    Water Springtail

    Podura aquatica
    Photo of Williams' crayfish.

    Williams’ Crayfish

    Faxonius williamsi (formerly Orconectes williamsi)
    Photo of a woodland crayfish.

    Woodland Crayfish

    Faxonius hylas (formerly Orconectes hylas)