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The Obsidian Tang has a dark black body colour with a faint yellow mask over the eyes and yellow tip to the pectoral fins, a white collar in seen aroun the caudial fins base.
In its natural habitat, the Obsidian Tang is generally found schooling in small groups along reefs or in clear-water lagoons. A larger aquarium with plenty of water movement, large amounts of live rock to provide both plenty of swimming room, and territories within the live rock is necessary. Its large size makes it a better fit for only appropriately-roomy showcase aquariums.
Although surgeonfish will eat meaty foods along with the other fish in the aquarium, it is important that they are offered plenty of marine based seaweed and algae foods. This will strengthen their immune system and improve their overall health. Offer dried seaweed tied to a rock or use a veggie clip, and feed at least 3 times per week.