
Cephalopholis argus
Family: Serranidae Β· Groupers & Basslets
Also known as: Peacock Hind, Peacock Grouper, Argus Grouper, Blue-Spotted Grouper
The Blue Dot Grouper, also known as the Peacock Hind, is a large and robust predatory fish distinguished by its dark brown body covered in vivid blue-rimmed ocelli (eye-spots). This species is one of the most widespread groupers in the Indo-Pacific, found from the Red Sea to the Hawaiian Islands.
In the wild, Blue Dot Groupers are apex predators on coral reefs, primarily hunting smaller reef fish and crustaceans during dawn and dusk. They are known for their intelligence and territorial behavior, often claiming specific sections of reef as their own and defending them vigorously against conspecifics.
In the home aquarium, this is strictly an advanced-level fish due to its large adult size (up to 24 inches), aggressive temperament, and substantial space requirements. A minimum tank size of 180 gallons is essential, with larger being better. They are not reef-safe and will consume any fish or crustacean small enough to eat. However, their intelligence, personality, and striking appearance make them rewarding pets for experienced aquarists with appropriately sized systems.
A voracious carnivore that requires a diet of meaty foods. Offer frozen silversides, lance fish, squid, shrimp, and high-quality carnivore pellets. Juveniles should be fed daily; adults can be fed every 2-3 days. Vary the diet to prevent nutritional deficiencies and avoid feeding live freshwater feeder fish.
Blue Dot Groupers are aggressive predators best kept with large, robust tankmates. Suitable companions include large tangs, triggerfish, large angelfish, moray eels, and other similarly sized groupers. Never house with small fish, ornamental shrimp, or delicate species. Best suited for large predator FOWLR systems.
Check CompatibilityLike other members of the Cephalopholis genus, this species is a protogynous hermaphrodite. Spawning involves pelagic egg release in open water and has not been replicated in captive settings due to the species' large size and complex reproductive requirements.