The Black Tang, Zebrasoma rostratum, also known as the Black Sailfin Tang, Black Longnose Surgeonfish, or Black Longnose Tang, is one of the most rare and sought-after tang species in the aquarium trade. The Black Tang is entirely jet black with a singular diamond-shaped white dot just before its anal fin. Its sleek look, as well as unique black coloration, makes this one of the most visually stunning species of Tangs. It has the same general body shape as a Sailfin Tang and a characteristic long bottlenose.They should be housed in at least a 180 gallon tank and be the only tang. They should also be the last fish introduced into the tank. They will take an omnivorous diet and eat brine and mysis shrimp but they must eat a selection of herbivorous foods such as algae or seaweed to strengthen their immune system and disease prevention.