Naso annulatus, commonly known as the Naso Tang or Ringtail Tang, is a large and visually impressive surgeonfish native to the Indo-Pacific region. Recognisable by its elongated body, distinctive ringed tail, and vibrant colouration, this species is a prized addition to spacious marine aquariums.
Care Level: Moderate to advanced. Due to its size and specific dietary needs, the Naso annulatus is best suited for experienced marine aquarists.
Temperament: Generally peaceful but can be territorial towards conspecifics or similar tang species. Best kept singly or in a very large tank if multiple tangs are desired.
Diet: Herbivorous. Requires a diet rich in marine algae and seaweed. Supplement with high-quality dried seaweed sheets, spirulina, and specialised herbivore pellets to maintain optimal health and vibrant colour.
Minimum Tank Size: At least 250 litres (approximately 65 gallons) to accommodate its active swimming behaviour and adult size.
Lighting Requirements: Standard marine aquarium lighting is sufficient. Lighting should support the growth of natural algae in the tank, which benefits the fish’s grazing habits.
Water Flow: Moderate to strong water movement mimics natural reef currents and supports overall fish health.
Placement: Provide ample open swimming space along with live rock for grazing. Avoid overcrowding and ensure stable water parameters.
Origin: Indo-Pacific region.
Maximum Size: Up to 45 cm (18 inches) in length.
Reef Safe: With Caution. While generally reef compatible, the Naso annulatus may nip at soft corals or clam mantles, so monitor behaviour closely.
Overall, the Naso annulatus is a spectacular fish that adds dynamic movement and colour to large marine aquariums. Proper care and tank conditions are essential to ensure its health and longevity.
