Cephalopholis polleni, commonly known as the marine grouper, is a captivating addition to larger marine aquariums. This species is prized for its vivid patterning and active predatory behaviour, making it a fascinating specimen for experienced hobbyists.
Care Level: Moderate to advanced care is recommended due to its size and dietary needs.
Temperament: Cephalopholis polleni is generally territorial and can be aggressive towards smaller or similarly sized fish. It is best housed with robust tank mates that can tolerate its assertive nature.
Diet: A carnivorous diet consisting of meaty foods such as live or frozen crustaceans, fish, and specialised marine pellets is essential to maintain health and vibrancy.
Tank Requirements: A minimum tank size of 250 litres is advised to provide ample swimming space and reduce territorial aggression. The aquarium should have plenty of hiding places and rockwork to mimic its natural reef environment.
Water Parameters: Stable marine conditions with a temperature of 24-27°C, salinity of 1.020-1.025 SG, and good water quality are critical for this species.
Reef Compatibility: With Caution – Cephalopholis polleni may prey on smaller invertebrates and fish, so it is not recommended for delicate reef setups.
Overall, Cephalopholis polleni is a rewarding species for marine aquarists who can provide the space and diet it requires. Its striking appearance and engaging behaviour make it a standout specimen in a suitably sized marine aquarium.



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