Danio rerio (Zebra Danio Or Zebrafish) is a species of ray-finned fishes in the family Danionidae. They are associated with freshwater habitat. Individuals are known to live for 5.5 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).