Key to Aquatic Macroinvertebrates in Utah - 4 pairs of legs

Aquatic organisms with 4 pairs of legs belong to the class Arachnida and the order Acariformes. 

Family Picture Description Habitat


water mite

Hydrachnidae are very small and brightly colored.  Many are red, but can be green, yellow, and blue. 

These organisms also have pedipalps that can appear to be a 5th pair of legs. 


Found in all types of freshwater habitats including rivers, streams, lakes, ponds, wetlands, and springs. 

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