Field Guide

Aquatic Invertebrates

Showing 1 - 10 of 55 results
Media
Two pairs of Asian clam shells, still hinged together, showing exterior and interior
Species Types
Scientific Name
Corbicula fluminea
Description
The Asian clam is a nonnative, invasive species that lives in a variety of aquatic habitats. It has thick shells with distinctly ridged, concentric rings and a yellowish-brown to dark brown shell covering.
Media
Bluefer
Species Types
Scientific Name
Potamilus purpuratus
Description
Like the pink heelsplitter and fragile and pink papershells, the bluefer uses freshwater drum as a host.
Media
Gray, speckled, translucent gelatinous blob cut in half to show structure
Species Types
Scientific Name
Freshwater species in the phylum Bryozoa
Description
Bryozoans are tiny, filter-feeding invertebrates. They create colonies that can be mossy, branching, or round and jellylike.
Media
Two Chinese mysterysnails, out of water, resting on a white surface, with a ruler nearby for scale
Species Types
Scientific Name
Cipangopaludina chinensis malleata (syn. Bellamya chinensis)
Description
The Chinese mysterysnail is a nonnative invasive species quickly taking over urban waters throughout the state. Never release aquarium species or aquarium water into natural aquatic habitats. Learn about and practice clean boating techniques so that you do not accidentally spread invasive aquatic species.
Media
Photo of a spothanded crayfish viewed from above on white background.
Species Types
Scientific Name
About 36 species in Missouri
Description
Crayfish are freshwater aquatic invertebrates that look a lot like small lobsters, to which they are related. There are about 36 species of crayfish in Missouri.
Media
Photo of a damselfly nymph on rocks in an aquarium.
Species Types
Scientific Name
Species in the suborder Zygoptera
Description
Damselfly larvae are narrow-bodied aquatic insects with large eyes, six thin legs, and three paddle-shaped, tail-like gills at the hind end.
Media
deertoe
Species Types
Scientific Name
Truncilla truncata
Description
A common mussel in some areas, deertoe have decorative green markings.
Media
Photo of a devil crayfish.
Species Types
Scientific Name
Lacunicambarus aff. diogenes (syn. Cambarus diogenes)
Description
The powerfully built devil crayfish is usually a uniform olive or tan, without obvious blotches or spots. It digs underground burrows, often with mud chimneys, and has a wide distribution.
Media
Photo of a dragonfly larva resting on a stone.
Species Types
Scientific Name
Species in the suborder Anisoptera
Description
Dragonfly larvae are aquatic insects with large eyes, six legs, and an oval or rounded segmented abdomen. The lower jaws are scooplike and cover much of the lower part of the head.
Media
Photograph of Ebonyshell freshwater mussel shell exterior view
Species Types
Scientific Name
Fusconaia ebena
Description
At one time the most valuable shell to the commercial button industry, the ebonyshell is now classified as Endangered in Missouri and is a candidate for federal Endangered status.
See Also

About Aquatic Invertebrates in Missouri

Missouri's streams, lakes, and other aquatic habitats hold thousands of kinds of invertebrates — worms, freshwater mussels, snails, crayfish, insects, and other animals without backbones. These creatures are vital links in the aquatic food chain, and their presence and numbers tell us a lot about water quality.