Cephalopholis formosa, commonly known as the Formosa Grouper, is a beautifully patterned marine fish prized in the aquarium hobby for its striking appearance and intriguing behaviour. This small variant is suitable for marine aquarists with experience in keeping predatory species.
Care Level: Moderate to advanced care is recommended due to its predatory nature and specific tank requirements.
Temperament and Compatibility: Cephalopholis formosa is a solitary and territorial species. It can be aggressive towards smaller fish and invertebrates, so it is best kept with larger, robust tank mates. Avoid housing with small or peaceful species to prevent stress or predation.
Diet: This grouper is carnivorous and thrives on a diet of meaty foods such as live or frozen crustaceans, fish fillets, and specialised carnivore pellets. Feeding should be regular but controlled to maintain health and water quality.
Tank Requirements: A minimum tank size of 180 litres (approximately 50 gallons) is recommended to provide adequate swimming space and territory. The aquarium should have plenty of live rock for hiding and ambush spots, replicating its natural reef environment.
Water Parameters: Maintain stable marine conditions with temperature between 24-27°C, salinity at 1.023-1.025 SG, and pH 8.1-8.4. Moderate water flow and good filtration are essential to support water quality.
Reef Safety: With Caution. Cephalopholis formosa may prey on smaller reef inhabitants such as shrimps and small fish, so it is not fully reef safe.
Overall, Cephalopholis formosa is a captivating addition to a species-specific or mixed marine aquarium for hobbyists prepared to meet its care demands.
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