Zebrafish

The zebrafish (Danio rerio) is a freshwater fish belonging to the minnow family (Cyprinidae) of the order Cypriniformes.[2]Native to the Himalayan region, it is a popular aquarium fish, frequently sold under the trade name zebra danio[3] (and thus often called a "tropical fish" although not native to the tropics). The zebrafish is also an important and widely used vertebrate model organism in scientific research, for example in drug development, in particular pre-clinical development.[4] It is also notable for its regenerative abilities,[5] and has been modified by researchers to produce many transgenic strains.[6][7][8]