The Acanthurus bahianus, commonly known as the Atlantic Surgeonfish, is a large and visually impressive tang native to the western Atlantic Ocean. Recognised for its deep blue body and distinctive yellow markings near the tail, this species adds dynamic movement and colour to mature marine aquariums.
Care Level: Moderate to advanced. This species requires stable water parameters and a spacious environment to accommodate its active swimming and territorial nature.
Temperament and Compatibility: Generally semi-aggressive, the Atlantic Surgeonfish can be territorial, especially towards conspecifics and similar tang species. It is best kept singly or in a large tank with ample hiding spaces and visual barriers. Compatible with other robust fish species but caution is advised when housing with smaller, timid fish.
Diet: Primarily herbivorous. Provide a varied diet rich in marine algae, seaweed sheets (nori), and specialised tang pellets to ensure optimal health. Supplement with occasional meaty foods such as mysis or brine shrimp.
Minimum Tank Size: At least 250 litres (approximately 65 gallons) to allow sufficient swimming space and reduce territorial aggression.
Reef Safety: With Caution. While generally reef safe, they may nip at certain corals or sessile invertebrates, especially if underfed or stressed.
Lighting and Water Flow: Standard marine aquarium lighting is suitable. Moderate to strong water flow mimics their natural reef environment and supports their health.
Placement: Mid to upper levels of the aquarium, where they can swim freely and graze on algae.
Origin: Western Atlantic Ocean, including the Caribbean Sea and Gulf of Mexico.
Maximum Size: Up to 35 cm (14 inches) in length.
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