Photo of a spothanded crayfish viewed from above on white background.

    Crayfishes

    About 36 species in Missouri
    Monkey Face Mussel

    Freshwater Mussels

    Bivalve molluscs in order Unionoida
    Photo of a leech

    Leeches

    Various species in the subclass Hirudinea
    pink mucket

    Pink Mucket

    Lampsilis abrupta
    exclamation mark

    Endangered

    round pigtoe

    Round Pigtoe

    Pleurobema sintoxia
    Photo of a shrimp crayfish.

    Shrimp Crayfish

    Faxonius lancifer (formerly Orconectes lancifer)