Orbiculate Batfish (Platax orbicularis) Care Guide
A magnificent, disc-shaped fish that develops into a large, graceful swimmer with elongated dorsal and anal fins as a juvenile.
Compiled by Aquairi from published sources · Published · Updated
Overview
Platax orbicularis is a species in the family Ephippidae. A magnificent, disc-shaped fish that develops into a large, graceful swimmer with elongated dorsal and anal fins as a juvenile. Juveniles are small and brown, mimicking dead leaves floating in mangroves. Adults become silvery with dark vertical bars and can reach 50 cm. Intelligent and peaceful but requires a very large system due to its adult size.
Taxonomy
- Family: Ephippidae
- Genus: Platax
- Scientific name: Platax orbicularis
- Other names: Orbicular Batfish, Round Batfish
- Origin: Indo-Pacific
Habitat
Platax orbicularis is a disc-shaped batfish of Indo-Pacific reefs, lagoons and estuaries; juveniles mimic floating leaves. An omnivore that grows very large, it grazes algae, invertebrates and detritus and requires a tall, spacious tank.
Tank requirements
- Minimum tank volume: 800 L
- Temperature: 24-28 °C
- pH: 8-8.4
- Salinity: SG 1.024-1.026
- KH: 8-12 dKH
- Water flow: moderate
- Adult size: 30-50 cm
- Lifespan: 10-15 years
- Recommended group size: ≥ 3
- Difficulty: advanced
Diet
Classified as omnivore. Recommended feeding frequency: 2x daily. In captivity, offer a varied diet appropriate to the species — quality prepared foods supplemented with frozen or live items of suitable size.
Compatibility
- Temperament: peaceful
- Position in tank: middle
- Compatible tank mates: Large Tangs, Large Angelfish, Groupers, Other Batfish
- Avoid with: Aggressive Fish, Nippy Fish, Corals
Reef compatibility
Generally classified as reef-safe with caution: may disturb other sessile invertebrates, sting neighbouring corals or prey on small ornamental shrimps, so placement and tankmates need consideration.
Breeding
- Breeding strategy: egg-scatterer
- Breeding difficulty: advanced
Orbiculate Batfish Breeding Guide
Overview
Platax orbicularis grows to a maximum total length of 60 cm, with females reaching reproductive maturity at around 32 cm. It lays pelagic eggs, an open-water reproductive mode that a home aquarium cannot support. While commercial food farms in French Polynesia rear this species, ordinary marine hobbyists do not breed it.
Spawning Behavior & Trigger
The species lays pelagic eggs, meaning fertilized eggs are buoyant and drift in the open water column rather than being deposited on a surface. Females reach maturity at roughly 32 cm, a size that itself demands a very large system well beyond typical home setups.
Egg & Fry Care
Wild juveniles hide among mangroves and protected lagoons, frequently among flotsam where they mimic dead leaves floating in the water column. This dispersed, open-water early life history, combined with the adult's large size, is why the species is reared only in dedicated commercial farms and not by hobbyists.