Scaly Cheek Damselfish

Geographical Origin and Habitat: Western Indo-Pacific, commonly found from the Ryukyu Islands to the Great Barrier Reef, New Caledonia, and Tonga. Inhabits outer reef slopes and passages exposed to currents at depths of 2 to 15 meters.

Taxonomy and Morphology: Classified under the family Pomacentridae, subfamily Pomacentrinae. The specific name and common name refer to the presence of small scales covering the cheek and gill cover.

Social Behavior: Moderately gregarious species. Forms loose groups that swim slightly above the reef structure to feed in the water column, though males defend specific shelter sites.

Coloration and Sexual Dimorphism: Light greyish-blue body color. The dorsal fin and upper part of the caudal peduncle are bright yellow. Pelvic and anal fins are mostly transparent to pale grey.

Aquarium Setup: Needs a tank of at least 100 liters with a layout of live rock providing various crevices and caves, set above a sandy substrate to simulate its natural habitat.

Diet and Feeding: Omnivorous. Feeds on algae and microinvertebrates in nature. Readily accepts flakes, pellets, frozen brine shrimp, mysis, and spirulina-based foods.

Water Quality: Standard marine parameters: temperature 23-28 °C, pH 8.1-8.4, and salinity 1.020-1.025 with standard filtration and moderate water movement.

Compatibility and Cohabitation: Semi-aggressive. Territorial towards other damselfishes and similarly sized fish. Best kept in a community aquarium with robust and active tankmates.

Aquarium Breeding: Oviparous. The male cleans a flat rock or cave ceiling, courts the female to spawn, and defends the adhesive egg clutch until hatching.

Risks and Diseases: Very hardy and highly resilient, making it suitable for beginner marine aquarists. Territorial behavior must be managed by avoiding cramped conditions.