Purple Tang (Zebrasoma xanthurum) Care Guide
A stunning marine fish with a deep purple body and bright yellow tail. One of the most prized tangs due to its vibrant coloring and relative rarity.
Compiled by Aquairi from published sources · Published · Updated
Overview
Zebrasoma xanthurum is a species in the family Acanthuridae. A stunning marine fish with a deep purple body and bright yellow tail. One of the most prized tangs due to its vibrant coloring and relative rarity. Hardy once acclimated but can be aggressive towards similar-shaped fish. Excellent algae grazer.
Taxonomy
- Family: Acanthuridae
- Genus: Zebrasoma
- Scientific name: Zebrasoma xanthurum
- Other names: Yellowtail Tang
- Origin: Red Sea, Indian Ocean
Habitat
Restricted to the Red Sea, Persian Gulf and adjacent western Indian Ocean, inhabiting coral-rich reef flats and outer slopes at depths of 1-20 m. Grazes filamentous algae and detritus from hard substrates. The species is one of the most colourful Zebrasoma surgeonfishes in the trade.
Tank requirements
- Minimum tank volume: 400 L
- Temperature: 24-27 °C
- pH: 8.1-8.4
- GH: 8-12 °dGH
- Water flow: strong
- Adult size: 20-25 cm
- Lifespan: 8-15 years
- Difficulty: intermediate
Diet
Classified as herbivore. 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: semi-aggressive
- Swimming level: middle
- Compatible tank mates: Clownfish, Royal Gramma, Firefish Goby, Wrasses
- Avoid with: Other Tangs, Similar-shaped Fish
Reef compatibility
Generally classified as reef-safe: does not feed on stony or soft corals, tridacnid clams or ornamental shrimps under normal conditions.
Breeding
- Breeding strategy: egg-scatterer
- Breeding difficulty: advanced
Purple Tang (Zebrasoma xanthurum) Breeding Guide
Overview
The purple tang, Zebrasoma xanthurum, is a marine surgeonfish of the family Acanthuridae from the Red Sea and the western Indian Ocean. Like other tangs, it reproduces by pelagic broadcast spawning: eggs and sperm are released into open water for external fertilisation, and the resulting eggs and larvae are planktonic. This reproductive strategy means it is not bred in home aquaria.
Spawning Behavior & Trigger
Surgeonfishes typically spawn at dusk in brief pair- or group-spawning events, often forming aggregations and releasing gametes into the water column. Spawning frequently shows lunar periodicity, with peaks around the full moon documented in studied Zebrasoma species. Such open-water ascents and aggregations cannot be reproduced in aquarium conditions.
Egg & Fry Care
Fertilised eggs are pelagic and develop into a distinctive transparent, open-ocean larva known as an acronurus, which drifts in the plankton for an extended period before settling on the reef. The acronurus is extremely fragile, sensitive to water quality, and requires specialised micro-prey, which is why it cannot be reared without dedicated hatchery technology.
Common Challenges
The first-ever captive breeding of any surgeonfish was the yellow tang (Zebrasoma flavescens), achieved by the Oceanic Institute of Hawaii Pacific University in 2015 after about ten years of work using cultured copepod prey. That achievement, a genus and family first, underscores that tang aquaculture remains a research undertaking rather than a home-aquarium activity.