The amazing world of Saltwater Tropical Fish. Owners of a Marine Reef Aquarium will quite often keep Reef Safe Species of fish. These fish will enhance the Reef Aquarium by grazing the nuisance algae, helping to rid aquarium pests, enhancing the living underwater world. Fish such as Yellow Tang, Purple Tang, Yellow Eye Tang, Goldrim Tang, Powder Blue Tang, Chevron Tang, Lipstick Tang, Mimic Tang, Goldrush Tang, Gem Tang are a few examples of frequently kept reef species. Anthias adorn the reef in the wild and many species can be kept in the aquarium and no aquarium is complete without the adored clownfish species.