Field Guide

Aquatic Invertebrates

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Media
Photo of a predaceous diving beetle
Species Types
Scientific Name
Species in the beetle family Dytiscidae
Description
Like many aquatic insects, these large oval beetles prey voraciously on other aquatic organisms. Excellent swimmers, they fly well, too, and are often attracted to lights.
Media
Photo of a collared water scavenger beetle showing back.
Species Types
Scientific Name
Beetles in the family Hydrophilidae
Description
Water scavenger beetles are a mostly aquatic family. They are similar to predaceous diving beetles, but unlike them many have a distinctive spine running down the center of their bellies.
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.