Etheostoma caeruleum (Rainbow Darter) is a species of ray-finned fishes in the family Percidae. They are associated with freshwater habitat. Individuals are known to live for 3 years.
Definition: A habitat that is in or on a body of water containing low concentrations of dissolved salts and other total dissolved solids (<0.5 grams dissolved salts per litre).
Definition: A shallow stretch of a river or stream, where the current is above the average stream velocity and where the water forms small rippled waves as a result. It often consists of a rocky bed of gravels or other small stones.
