The Rainbow Shark, also known as the Ruby Shark or Red-Finned Shark, is great for the semi-aggressive community aquarium, as long as they are the sole shark and the other tankmates are of similar size. The Rainbow Shark is a beautifully colored fish which is a dark gray to black with red fins.
It requires a large aquarium with driftwood, rocks, and spots of dense vegetation. This shark may set up territories around the aquarium. The Rainbow Shark will become very aggressive towards its own species.