
Platax orbicularis
Family: Ephippidae ยท Batfish
Also known as: Orbiculate Batfish, Round Batfish, Circular Batfish, Cooper Batfish
The Orbicular Batfish is a majestic and strikingly disc-shaped species that has captivated aquarists with its dramatic appearance and gentle demeanor. Juveniles are particularly remarkable, with extremely elongated dorsal and anal fins that give them an almost perfectly round silhouette and a rich brown to orange coloration often accented with dark vertical bars. As they mature, the fins become proportionally shorter, the body takes on a more silvery-gray hue with subtle dark banding, and the fish develops a commanding presence in any large aquarium. Adults can reach an impressive 20 inches in diameter.
In the wild, Orbicular Batfish are found in lagoons, sheltered bays, and around shipwrecks and artificial structures throughout the Indo-Pacific. Juveniles are frequently found drifting among mangrove roots and floating debris, where their leaf-like appearance provides camouflage from predators. Adults form small groups in deeper water near steep reef walls and channel entrances, where they feed on algae, small invertebrates, and jellyfish. Their willingness to approach divers and their inquisitive nature make them favorites among underwater photographers.
The Orbicular Batfish requires a very large aquarium of at least 300 gallons due to its substantial adult size and active swimming nature. It is considered reef-compatible with caution, as it may consume soft corals, anemones, and certain invertebrates, particularly when hungry. Despite this, many aquarists successfully keep them in carefully managed reef systems. The Orbicular Batfish is a hardy, personable species that adapts well to captivity, readily accepting a wide range of foods and often becoming the most interactive fish in the tank.
Orbicular Batfish are omnivores that accept a wide variety of foods in captivity. Offer frozen mysis shrimp, enriched brine shrimp, chopped seafood, marine algae, Spirulina-based foods, and high-quality pellets. They will also readily consume nori seaweed sheets. Their appetite is robust and they grow quickly, so regular feeding two to three times daily is important. A varied diet helps maintain health and coloration.
The Orbicular Batfish is a peaceful and gentle species that coexists well with a wide range of tankmates. Compatible with tangs, angelfish, wrasses, clownfish, and other community reef fish. Avoid housing with highly aggressive species that may bully the slow-moving batfish. May be kept in small groups in very large systems. Will not bother fish tankmates but may eat soft corals and small invertebrates.
Check CompatibilityOrbicular Batfish have not been bred in home aquariums. In the wild, they are pelagic spawners that release buoyant eggs into open water. The larvae go through an extended pelagic phase before settling into juvenile habitat among mangroves and floating debris. The enormous tank size required for adults and the pelagic larval stage make captive breeding impractical for hobbyists.