Chondrostoma nasus (Sneep) is a species of ray-finned fishes in the family Leuciscidae. They are associated with freshwater habitat. Individuals are known to live for 15 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: Gravel is an environmental material which is composed of pieces of rock that are at least two millimeters (2mm) in its largest dimension and no more than 75 millimeters.