Rhinecanthus rectangulus, also known as the rectangular triggerfish, is a visually captivating species prized for its distinctive rectangular body shape and vibrant colouration. This small triggerfish is a popular choice among marine aquarium enthusiasts who appreciate its bold patterns and active behaviour.
Care Level: Moderate to advanced. Rhinecanthus rectangulus requires stable water conditions and a well-maintained aquarium.
Temperament: Semi-aggressive. This species can be territorial, especially towards other triggerfish or similarly shaped species. It is best kept singly or with robust tankmates.
Diet: Omnivorous. Feed a varied diet including meaty foods such as mysis shrimp, krill, and chopped seafood, supplemented with algae-based foods to ensure balanced nutrition.
Minimum Tank Size: 150 litres (approximately 40 US gallons). A spacious tank with plenty of hiding places and rockwork is essential to accommodate its active swimming and territorial nature.
Lighting Requirements: Standard marine aquarium lighting is sufficient. No special lighting needs are required.
Water Flow: Moderate water flow mimicking natural reef environments is ideal.
Placement: Provide ample rockwork and caves for shelter. Avoid overcrowding to reduce stress and aggression.
Origin: Indo-Pacific region.
Maximum Size: Up to 20 cm (8 inches).
This species is generally reef safe with caution, as it may nip at invertebrates or smaller fish. Careful monitoring is advised when housed in reef aquariums.
Overall, Rhinecanthus rectangulus is a rewarding species for marine aquarists who can provide the space and stable environment it requires.
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