Flame Fin Tomini Bristletooth Tang

The Flame Fin Tomini Bristletooth Tang, Ctenochaetus tominiensis, is one of the more compact bristletooth surgeonfishes available to reef keepers. The body is tan to brown, trimmed with yellow-to-orange edging along the dorsal and anal fins and finished with a pale or white tail. Juveniles show additional yellow, blue, and white highlights that fade as the fish matures. Angular dorsal and anal fins help separate this species from its relatives, and the tail changes shape with age, forked in juveniles and lunate in adults. Adults reach roughly 6.3 inches, or 16 cm standard length. The range runs from Bali and Sulawesi east to Palau and Fiji, north to the Philippines, and south to Queensland, where the species keeps to sheltered, coral-rich reef slopes and drop-offs.

Plan on a 70-gallon aquarium or larger for an adult, arranged so that open swimming lanes sit alongside substantial rockwork. Caves and crevices matter here for two reasons: they provide retreats, and they create the visual breaks that keep a territorial surgeonfish from patrolling the entire display. An established reef system suits this fish well, since algae-bearing rock gives it surfaces to graze throughout the day. Good water movement and stable parameters support long-term health, and the fish adapts readily to a mature tank with plenty of live rock.

On the reef, this bristletooth works over algae and the microfauna living within it, combing surfaces with its brush-like teeth. In the aquarium, marine algae should form the foundation of the diet. Offer nori or another dried seaweed, Spirulina, and algae-based flakes or pellets, and allow the fish continuous access to naturally grazed rock. Marine flakes or pellets and occasional animal-based foods serve as supplements to that plant-rich base rather than the main course.

Feed small portions frequently to match the fish's constant grazing habit, and provide dried seaweed at least three times per week. Relying on the aquarium's natural algae growth alone is a mistake, since an underfed specimen is the one most likely to start sampling invertebrates. Keeping the fish well fed is the single most effective way to preserve its good behavior in a reef display.

Dried Seaweed Nori Spirulina Algae-Based Flakes Algae-Based Pellets Marine Flakes Marine Pellets
Wild individuals are found singly or in small groups along sheltered coral-rich drop-offs, and captive specimens spend their days actively working the rockwork. This tang is generally well behaved toward unrelated community fish, but it carries a semi-aggressive streak directed at its own kind. Other tangs, especially species with a similar body shape, are the usual targets. A long-settled specimen may also bully newcomers introduced after it, so thoughtful stocking order and generous space reduce friction.

The best companions are calm reef fish that will not nip at its fins. Approach mixed surgeonfish combinations cautiously and only in systems that offer real swimming volume, multiple retreats, and broken sightlines. This species is reef safe and coral compatible, and it coexists with small invertebrates under normal conditions. Bear in mind the one caveat: a hungry specimen may pick at small mobile or sessile invertebrates, which is a feeding problem rather than a trait of the fish.

FAQ

Frequently Asked Questions

About the Flame Fin Tomini Bristletooth Tang

  • What is the minimum long-term aquarium size for this tang?
    Provide at least 70 gallons for an adult. The layout should combine open swimming room with rockwork that supplies grazing surfaces, caves, and retreats.
  • Can it be housed with other tangs?
    Use caution. It is usually well behaved with unrelated fish but may turn aggressive toward other tangs, particularly similarly shaped species, so ample space and territorial separation are essential.
  • Is it safe for a reef aquarium and its invertebrates?
    Yes, it is considered reef safe and coral compatible. An underfed specimen may pick at small mobile or sessile invertebrates, so maintain consistent algae-based feedings.