in practically all aquarium pet stores. in the aquarium environment the green tiger barb is an active brightly colored species that will generally be found swimming at lower and mid levels of the aquarium. they have a reputation as being fin nippers; however, this reputation is somewhat unfair as barbs in general exhibit this as part of their natural behavior. it is important to keep green tiger barbs in groups of 4 or more, so that they can swim as a group and nip at each other instead of other aquarium species. green tiger barbs will not injure each other with this behavior as it is something barb do among 