Saltwater Tang Care Guide

Tangs (surgeonfish) are among the most popular and visually striking reef fish — but they come with real care requirements. Getting them right means a long-lived, healthy fish; getting them wrong is expensive and heartbreaking. Here’s what you need to know.

Popular Tang Species

• Blue Hippo Tang (Paracanthurus hepatus) — the iconic “Dory”; stunning but demanding
• Yellow Tang (Zebrasoma flavescens) — hardy, algae-focused, great for beginners
• Purple Tang (Zebrasoma xanthurum) — bold and aggressive; best kept solo
• Two Spot Bristletooth Tang (Ctenochaetus binotatus) — excellent sand-sifter and detritus eater

Tank Requirements

• Minimum tank size: 100 gallons (6-foot tank preferred for most species)
• Temperature: 24–27°C (75–80°F)
• Salinity: 1.023–1.026 sg
• Strong flow — tangs are open-water swimmers from surge zones
• Excellent filtration and low nitrates (<10 ppm for reef)

Diet

Tangs are primarily herbivores. A varied diet is critical:

• Nori (dried seaweed) on a clip — offer daily
• Quality herbivore pellets or flakes
• Frozen mysis or brine shrimp occasionally
• Macroalgae if your tank has it

Poor diet is the #1 cause of HLLE (Head and Lateral Line Erosion) in tangs.

Compatibility

• Tangs can be aggressive with other tangs — introduce multiple tangs simultaneously if keeping more than one, or choose different genera
• Generally peaceful with non-tang reef fish
• Avoid keeping with fin-nippers

Quarantine

Tangs are highly susceptible to ich and velvet. Always quarantine for 4–6 weeks before adding to a display tank. Treat prophylactically if possible.

Shop Saltwater Fish

Browse our current tang availability in our Saltwater Fish collection, including Blue Hippo, Purple, and Two Spot Bristletooth tangs.