Black Spot Surgeonfish Tang

Black Spot Surgeonfish Tang (Acanthurus bariene) is a semi-aggressive species that is reef-safe as it poses no threat to corals or most invertebrates, focusing primarily on algae grazing. This distinctive species displays a pale gray to silver body with a prominent large black spot on the side that gives it its common name, plus subtle blue accents around the fins and the characteristic sharp spine (scalpel) at the base of the tail. The bold black spot and clean body coloration make it easily recognizable and an attractive alternative to more common tang species. It can reach about 16 inches in adult size. Best kept in tanks of at least 150 gallons or more due to their substantial adult size and active swimming nature, with plenty of live rock for grazing, strong water flow, excellent water quality, and consideration for their territorial behavior toward other tangs, especially those of similar body shape or color patterns. Its diet should include a mix of marine algae—nori sheets, spirulina, dried seaweed, algae pellets—as well as high-quality herbivore foods and occasional meaty supplements like mysis shrimp, as this primarily herbivorous species requires constant access to plant matter and benefits from varied algae sources to maintain optimal health and vibrant coloration.

International Aquatics Quarantine & Guarantee: All fish are checked by marine vets, given a formalin bath, and held for 14 days in copper-treated systems. We feed Selcon-soaked food with Kanaplex and Metroplex during quarantine. Unless marked, all livestock comes with our 15-Day Guarantee. You will receive a video of your fish eating before shipment. On request, we also send photos/videos after arrival at IA.

Several species will be import-to-order and may take anywhere from 3-10 business days to secure. Once your fish is secured, you will be notified, and the quarantine process will then begin.