Acanthurus tristis is a medium-sized tang species native to the Indian Ocean, prized for its elegant shape and subtle colouration. This surgeonfish is a peaceful addition to a well-established marine aquarium, especially suited for hobbyists with experience in maintaining larger tanks.
Care Level: Moderate – requires stable water conditions and ample swimming space.
Temperament: Generally peaceful but may show territorial behaviour towards conspecifics or similar tang species.
Diet: Primarily herbivorous; provide a varied diet rich in marine algae, seaweed sheets, and supplemented with high-quality herbivore pellets or flakes.
Minimum Tank Size: 180 litres (approximately 50 gallons) or larger to accommodate active swimming and territorial needs.
Reef Compatibility: With Caution – may nip at soft corals or clam mantles; monitor closely in reef setups.
Lighting and Water Flow: Standard lighting suitable for marine fish; moderate to strong water flow to mimic natural reef currents.
Placement: Provide plenty of live rock for grazing and hiding spots. Ensure ample open swimming areas.
Origin: Indian Ocean.
Maximum Size: Up to 25 cm (10 inches).
Regular water changes and stable water parameters are essential for maintaining health. Avoid housing with overly aggressive species. Introducing this tang last in a community tank can help reduce territorial disputes.
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