The Yellow Boxfish (Ostracion cubicus) is a fascinating species known for its vibrant yellow colour and distinctive box-shaped body. This tiny tank-bred specimen is ideal for marine aquarists seeking a unique and visually striking fish.
Care Level: Moderate to advanced. This species requires stable water conditions and a well-maintained aquarium.
Temperament: Generally peaceful but can be shy. It may release toxins when stressed, so careful handling and compatible tank mates are essential.
Diet: Omnivorous. Feed a varied diet including high-quality marine pellets, frozen mysis shrimp, brine shrimp, and algae-based foods to ensure balanced nutrition.
Minimum Tank Size: 150 litres (approximately 40 US gallons) to provide ample swimming space and maintain water quality.
Reef Safe: With Caution. While generally reef safe, the Yellow Boxfish may nip at small invertebrates or corals, and its toxin release can be harmful to other tank inhabitants if stressed.
Lighting Requirements: Standard marine aquarium lighting is sufficient.
Water Flow: Moderate water flow is preferred to mimic natural reef environments without causing stress.
Placement: Provide plenty of hiding spots with live rock and open swimming areas. Avoid aggressive tank mates to reduce stress.
Origin: Not Provided (tank-bred specimen).
Maximum Size: Up to 38 cm (15 inches) in the wild; tank specimens typically remain smaller.
Due to their toxin-producing capability, it is crucial to maintain excellent water quality and avoid overcrowding. Quarantine new arrivals and monitor behaviour closely to ensure a healthy, thriving aquarium environment.



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