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 sharks and the other tankmates are of similar size. The Rainbow Shark is a beautifully colored fish which is a pink with bright red fins, and red eyes.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 when mature.