Atlantic Blue Tang – Acanthurus coeruleus

Acanthurus coeruleus—known as the Atlantic Blue Tang or Caribbean Blue Tang—is a lively, reef-safe herbivore prized for its dramatic color shift: juveniles are bright yellow, maturing to deep cobalt with subtle facial striping and a powder-blue edge. Active and alert, this species thrives in mature 90–120+ gallon aquariums with long swimming lanes, strong oxygenation, and abundant established rock for constant grazing. Generally peaceful with dissimilar tankmates, it may posture toward other tangs; keep singly or add last. Provide an algae-forward diet—nori/seaweed on clips, spirulina pellets, and quality herbivore blends—with occasional mysis to maintain condition and vibrant coloration. An efficient film algae and diatom specialist, the Atlantic Blue Tang leaves corals alone, making it an excellent choice for mixed reefs and FOWLR systems. Our Acanthurus coeruleus for sale are expertly conditioned at Discover Aquatics in Taylor Mill, KY and ship via UPS Next Day Air® for peak health. Buy saltwater fish online with confidence from your local aquarium store serving Cincinnati, Northern Kentucky, and Indiana—and round out your display with our WYSIWYG coral.