Rhithropanopeus harrisii is a species of decapods in the family Panopeidae. They are associated with freshwater habitat. They are native to United States, Canada, and Mexico. Individuals can grow to 15 mm.
Definition: Expressions of the estuarine biome occur at wide lower courses of a rivers where they flow into a sea. Estuaries experience tidal flows and their water is a changing mixture of fresh and salt.