The yellow tang is one of the most iconic reef fish, known for its brilliant lemon-yellow body, disc-shaped profile, and algae-grazing habits. Once among the most common marine fish in the hobby, collection restrictions in Hawaii have made wild-caught specimens more expensive. Captive-bred yellow tangs are now available, representing a major aquaculture achievement.
Quick facts
| Scientific name | Zebrasoma flavescens |
| Max size | 8 in (20 cm) |
| Min tank size | 75 gal (285 L) |
| Temperament | Semi-aggressive |
| Diet | Herbivore |
| Reef safe | Yes |
| Care level | Easy |
| Origin | Pacific (Hawaii) |
Overview
The following sections detail exactly how to keep this species thriving in a saltwater reef environment.
Tank requirements
A minimum of 75 gallons is recommended to provide adequate swimming space. Yellow tangs are active open-water swimmers that need room to roam. Provide ample live rock with algae growth for grazing. They tolerate strong lighting and appreciate moderate to strong flow. A well-oxygenated tank with stable parameters is essential for long-term health.
Water parameters
Maintain standard reef aquarium parameters for long-term health:
- Temperature: 75–80 °F (24–27 °C)
- pH: 8.0–8.4
- Salinity: 1.024–1.026 sg
- Alkalinity: 8–11 dKH
- Ammonia / Nitrite: 0 ppm
- Nitrate: < 20 ppm (lower is better for a reef)
Stability is more important than hitting a specific number. Avoid sudden swings in any parameter.
Diet and feeding
Primarily herbivorous—offer nori (dried seaweed) daily using a veggie clip. Supplement with spirulina-enriched pellets, frozen Mysis shrimp, and blanched vegetables. Continuous access to marine algae is critical for digestive health and color vibrancy. Feed 2–3 times daily. A diet lacking in algae leads to HLLE (head and lateral line erosion).
Behavior and compatibility
Semi-aggressive, especially toward other tangs and surgeonfish. Keep only one yellow tang per tank unless the system is very large (180+ gallons). They coexist well with clownfish, wrasses, gobies, and most non-tang species. If keeping multiple tang species, add them all simultaneously to a large tank and ensure each has a different body shape.
Breeding
Pelagic spawners in the wild. Biota Marine Life Nursery achieved the first captive-bred yellow tangs, which are now commercially available at a premium price. Home breeding is not currently feasible.
Tips for success
- Feed nori daily—tangs that lack sufficient algae in their diet develop HLLE.
- Consider captive-bred specimens to support sustainable aquaculture efforts.
- Provide strong water flow to simulate their natural reef crest habitat.
- Quarantine for a full 72 days—tangs are highly susceptible to marine ich.
- Avoid housing with other Zebrasoma species in tanks under 180 gallons.
Frequently asked questions
What is the minimum tank size for a yellow tang?
75 gallons is the widely accepted minimum for a single yellow tang. They are active swimmers that need horizontal swimming space. Keeping one in a nano tank leads to stress, aggression, and health problems.
Why is my yellow tang so expensive?
Collection restrictions in Hawaii (their primary source) have significantly reduced wild-caught supply. Captive-bred yellow tangs are available but cost more due to the difficulty of rearing them. Expect to pay $200–$400+ for a captive-bred specimen.
Can I keep a yellow tang with other tangs?
Yes, in large tanks (180+ gallons) with different-shaped tang species. Avoid pairing with other Zebrasoma tangs (like the purple tang) in smaller setups. Add all tangs simultaneously to reduce territorial disputes.
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