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.
Hydrachnidae (water mite)
Description: 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. Less than 2mm.
Habitat: Found in all types of freshwater habitats including rivers, streams, lakes, ponds, wetlands, and springs.