Gold Rim Tang

Gold Rim Tang (Acanthurus nigricans) Care Level: Moderate Temperament: Semi-aggressive Color Form: Blue, Gold, White Diet: Herbivore Reef Compatible: Yes Water Conditions: 72-78°F, dKH 6-12, pH 7.8-8.4, sg 1.020-1.025 Max Size: 8.3" (21 cm) Family: Acanthuridae Minimum Tank Size: 500 Litres Overview The Gold Rim Tang (Acanthurus nigricans), also known as the Whitecheek Surgeonfish, is a striking addition to marine aquariums due to its distinctive colour pattern and graceful swimming behaviour. Its velvety dark body contrasts sharply with the bright golden yellow band around the dorsal fin and a noticeable white cheek patch, giving it a striking appearance. This tang is often sought after by intermediate and experienced aquarists due to its beautiful coloration and activity in the aquarium. Behaviour and Habitat In the wild, the Gold Rim Tang can be found swimming around shallow reefs in the Indo-Pacific, where it feeds primarily on algae. It is a very active swimmer and requires ample swimming space in captivity. It may show territorial aggression towards other tangs, especially those with similar body shapes or coloration, so it's advisable to house it either singly or with other peaceful species that don't resemble tangs. While it can be semi-aggressive, especially towards other tangs, the Gold Rim Tang usually behaves peacefully towards other fish in a reef or community aquarium setting. Tank Requirements A minimum tank size of 500 Litres is required for the Gold Rim Tang, as it needs ample space to swim and graze. It thrives in aquariums with plenty of live rock, which provides natural surfaces for grazing on algae, one of its main food sources. Providing strong water flow will mimic the tang's natural environment and encourage active swimming. Diet As an herbivore, the Gold Rim Tang feeds primarily on algae in the wild. In the aquarium, its diet should be rich in marine-based seaweed, algae, and vegetable matter. Foods like nori sheets, spirulina, and high-quality herbivore pellets are recommended to maintain its health and vibrant coloration. Supplementing its diet with meaty foods, such as mysis shrimp or brine shrimp, can also be beneficial, but the primary focus should be on a plant-based diet. It is important to feed the Gold Rim Tang several times a day, ensuring there is a steady supply of marine algae available. Care Tips Ensure excellent water quality as the Gold Rim Tang is sensitive to poor conditions. Provide plenty of live rock for natural grazing and hiding places. Introduce tangs to the aquarium with caution, as they can become territorial with other species of tangs. Quarantine the fish prior to adding it to a display tank, as this species can be prone to Marine Ich (Cryptocaryon irritans) and other parasites. Compatibility The Gold Rim Tang is best kept with peaceful tankmates, although it may become aggressive towards other tangs or similarly shaped species. It's important to avoid housing it with other tangs unless the tank is large enough to accommodate multiple territories. In a reef aquarium, the Gold Rim Tang is considered reef-safe, as it does not nip at corals or invertebrates. Final Thoughts The Gold Rim Tang is a fantastic addition to any large marine or reef aquarium, combining beauty with an important role in algae control. Its active swimming and distinct coloration make it a focal point in the aquarium, but it does require careful consideration of tank size, diet, and tankmates to ensure it thrives.