Description: Thick, oval shell. Concentric striae feel rough when scratched. Length 10-20 mm, but can grow up to 50 mm. Yellow, green, or brown in color.

Habitat: Burrows in sediment of freshwater lakes and rivers.  Cobiculidae has been collected throughout Utah from Lake Powell to Box Elder County.

Description: Distinct triangular shaped shell, striped patterns. Exotic species from Eastern Europe. Up to 50 mm in length

Habitat: Zebra mussels are not yet found in Utah, Quagga mussels can be found in Sand Hollow Reservoir

Description: Shells are thin, smooth, and generally oval. Yellow, green or white in color. Less than 25 mm in length, generally less than 10 mm.

Habitat: Found in nearly all aquatic habitats.