Desjardin's Sailfin Tang (Zebrasoma desjardinii) Care Guide
Zebrasoma desjardinii is a large Indian Ocean surgeonfish with a tall dorsal and anal sail and an intricate barred pattern, needing a spacious tank.
Compiled by Aquairi from published sources · Published · Updated
Overview
Zebrasoma desjardinii, the Indian sailfin tang, is a large surgeonfish of the family Acanthuridae from the Indian Ocean. Its body is grey with roughly eight dark vertical bars carrying orange or yellow lines that break into spots, and the tall dorsal and anal fins form a characteristic sail.
Taxonomy
- Family: Acanthuridae
- Genus: Zebrasoma
- Scientific name: Zebrasoma desjardini
Habitat
The species occurs throughout the Indian Ocean, from East Africa and the Red Sea to the Andaman Sea, western Sumatra and rarely Christmas Island. It lives in lagoon and seaward reefs at depths of about 1-30 m; adults usually occur in pairs while juveniles are solitary among staghorn corals.
Tank requirements
- Minimum tank volume: 800 L
- Temperature: 24-26 °C (75-79 °F)
- pH: 8.1-8.4
- Specific gravity: 1.024-1.026
- Carbonate hardness (dKH): 8-12
- Water flow: high
- Adult size: up to about 40 cm
- Lifespan: 10-25 years
Diet
This is a herbivore that feeds chiefly on filamentous algae, macroalgae and plankton; in the Red Sea it has been observed eating moon jellies and comb jellies. In the aquarium it requires plentiful algae or dried marine algae offered several times daily.
Compatibility
Semi-aggressive, especially toward other tangs. It can be kept with wrasses, clownfish, angelfish and sturdy triggers. Other tangs, particularly those of similar shape, should be avoided in smaller tanks.
Reef compatibility
The Indian sailfin tang is reef-safe and helps control nuisance algae. Its large adult size means it needs a spacious reef aquarium with strong flow.
Breeding
Zebrasoma desjardinii is a pair spawner. Aquarium breeding is not established and is considered an expert undertaking.
Desjardin's Sailfin Tang Breeding Guide
Overview
Zebrasoma desjardinii, Desjardin's sailfin tang, is a large Indian Ocean surgeonfish of East Africa, the Red Sea and the eastern Indian Ocean, reaching about 40 cm. Adults occur in pairs on lagoon and seaward reefs, while juveniles are solitary among staghorn corals. As an acanthurid it is a herbivorous algae grazer and, like its family, a pelagic broadcast spawner. IUCN status is Least Concern.
Sexing
Surgeonfish show little reliable external sexual difference, and Zebrasoma sexes are not separated by colour or fixed markings. In practice the sexes are recognised only by behaviour at spawning, when individuals pair or group and ascend together to release gametes. This makes deliberate sexing of this species impractical in the home aquarium.
Conditioning
As a large grazer, the species needs heavy, continuous access to marine algae and frequent feeding, which keeps fish in good condition. Stable warm reef water and a very large system are prerequisites simply to hold the fish well, let alone to approach reproductive condition.
Breeding Setup
Because this is a broadcast spawner that releases eggs into open water, reproduction depends on water-column space rather than a nest site. The species is not established as a home-bred fish, and no aquarium breeding setup has been documented for it; any account here therefore describes the general acanthurid reproductive pattern, not a proven home protocol.
Spawning Behavior & Trigger
Acanthurids reproduce by broadcast spawning: pairs or groups rise in the water column and release eggs and sperm that are fertilised externally, with the eggs dispersing as plankton. No species-specific captive spawning trigger is documented for Zebrasoma desjardinii.
Egg & Fry Care
Surgeonfish provide no parental care; the fertilised eggs are pelagic and drift freely. They hatch into a distinctive transparent larva called an acronurus, which lives in open water for an extended pelagic period before settling near the shore and transforming into a juvenile. Rearing this stage requires specialised techniques not feasible in a home tank.
Common Challenges
While spawning surgeonfish in captivity is comparatively achievable, rearing their tiny larvae through the long acronurus stage is considered one of the hardest goals in marine fish culture. The first tang reared to settlement was the yellow tang Zebrasoma flavescens, after about a decade of work by a dedicated institute; Zebrasoma desjardinii has not been raised this way.