White Tail Bristletooth Tang

The White Tail Bristletooth Tang is a beautifully detailed surgeonfish prized for its deep reddish-brown to burgundy coloration, fine orange horizontal striping, bright yellow eye ring, and sharply contrasting white tail. Ctenochaetus flavicauda has the specialized bristle-like teeth characteristic of its genus, which it uses to continually rasp rock surfaces for fine algae, detritus, and organic films. Its relatively compact adult size and constant grazing behavior make it especially appealing for established marine aquariums.

Native to the central and South Pacific, including French Polynesia and surrounding island groups, this saltwater fish inhabits shallow coral reef environments where natural grazing surfaces are abundant. In a mature reef aquarium or fish-only aquarium, it is an active and attractive addition that generally remains peaceful toward unrelated fish while becoming territorial with other tangs. Its combination of distinctive coloration, manageable adult size, and useful grazing behavior has made it one of the more sought-after Ctenochaetus species.

Quick Care Guide

Care Level: Moderate
Minimum Tank Size: 125 gallons
Temperament: Semi-aggressive
Diet: Herbivore / Detritivore
Reef Safe: Yes
Region: Central and South Pacific, including French Polynesia
Scientific Name: Ctenochaetus flavicauda

Tank Requirements

Provide a mature aquarium with abundant live rock and open swimming space. Established rockwork is particularly important for this species because it spends much of the day using its specialized mouthparts to graze fine algae, detritus, and naturally occurring biofilm from hard surfaces.

Arrange the aquascape with caves and protected resting areas while leaving clear swimming lanes through the aquarium. Moderate to strong water movement, good gas exchange, and efficient filtration are recommended.

Although smaller than many other surgeonfish, the White Tail Bristletooth Tang remains an active swimmer and should not be confined to a cramped aquarium. A secure lid is also advisable, particularly during acclimation or periods of territorial conflict.

Diet and Feeding

In nature, the White Tail Bristletooth Tang feeds heavily on detritus, fine algal growth, and organic material collected from reef surfaces. A well-established aquarium with mature rockwork provides valuable opportunities for this natural grazing behavior.

Offer dried marine algae or nori regularly along with spirulina-based pellets, high-quality herbivore foods, and frozen marine blends. Mysis shrimp and enriched brine shrimp can be included as supplemental foods, but vegetable-based and algae-rich offerings should remain an important part of the diet.

Several smaller feedings throughout the day work well for this active grazer. Maintaining good natural growth on portions of the rockwork can also help encourage normal feeding behavior between prepared meals.

Temperament and Tankmates

The White Tail Bristletooth Tang is generally peaceful toward unrelated marine fish but can become territorial toward other surgeonfish. Aggression is most likely toward other Ctenochaetus species or tangs occupying a similar grazing niche.

Keeping a single bristletooth tang is the simplest approach in moderately sized aquariums. Multiple tangs are best attempted only when sufficient swimming space, grazing territory, and multiple feeding locations are available.

Good tankmates include clownfish, wrasses, gobies, anthias, dwarf and larger angelfish, and other peaceful to semi-aggressive marine species. Very timid fish should still be monitored when introduced to an established tang.

Reef Compatibility

The White Tail Bristletooth Tang is considered reef safe and normally leaves healthy corals, clams, ornamental shrimp, crabs, snails, and other common reef invertebrates alone.

Its constant grazing makes it particularly well suited to reef aquariums, where it can help remove fine algal films and organic buildup from rock surfaces. It should not, however, be expected to control every type of nuisance algae, and regular supplemental feeding remains necessary.

Water Parameters

Temperature: 75–80°F
Specific Gravity: 1.024–1.026
pH: 8.1–8.4
Alkalinity: 8–12 dKH

Maintain stable water chemistry, consistent salinity, and good oxygenation. Avoid sudden changes in temperature or water quality, particularly during the acclimation period.

Common Considerations

• Requires mature grazing surfaces: Established live rock provides the fine algae, detritus, and biofilm this species naturally spends much of the day feeding on.

• Can be territorial with other tangs: Particular caution is warranted with other Ctenochaetus species and similarly shaped surgeonfish.

• Reaches approximately 6–6.5 inches: Despite its relatively compact adult size, it remains an active fish that requires adequate swimming room.

• Benefits from frequent feeding: Regular access to algae-based foods and multiple smaller meals help complement its continuous grazing behavior.

• Sharp caudal spine: Like other surgeonfish, it carries a defensive spine near the base of the tail and should be handled carefully.