Mustard Tang

Overview

The Mustard Tang (also called the Indian Ocean Mimic Surgeonfish) is a mustard-yellow to olive-brown tang with a distinctive orange ring around the eye, native to the Indian Ocean. As a juvenile it can resemble certain dwarf angelfish colouration, similar in concept to the more commonly known Mimic Tang from the Pacific.

It requires the same general care as other mid-to-large Acanthurus species: strong water flow, open swimming space, and a diet centred on marine algae. It's a moderately hardy tang for keepers with an established, well-cycled system.

Because it's less commonly available than some other tangs, it can command a premium price, but its care requirements are broadly in line with similarly sized surgeonfish.

Compatibility

Mustard Tangs can be aggressive toward other tangs, particularly similarly shaped Acanthurus species, so a large tank and thoughtful stocking order are important if keeping multiple tang species. They are generally peaceful with non-tang tankmates such as clownfish, wrasses, and gobies.

This species is fully reef safe and won't bother corals, clams, or other reef invertebrates.

Health & quarantine

As with all Acanthurus tangs, marine ich susceptibility means a minimum four-week quarantine is strongly recommended, along with stable, high-quality water and strong flow to support oxygen demand. A nutrient-rich, algae-based diet supports immune function and helps the fish resist stress-related disease.