Whitetail Bristletooth

About

The Whitetail Bristletooth (Ctenochaetus flavicauda) is a surgeonfish from the remote reef systems of the Central and Eastern Pacific, turning up around island groups like the Society, Austral, and Line Islands as well as US Minor Outlying Islands. Places that don't always make the short list when people think about tang origins. In the wild it works coral reef habitat from the shallows down to at least 30 meters, grazing constantly across rock and rubble surfaces. Like other bristletooth tangs, it uses its flexible, comb-like teeth to scrape detritus and fine algae from hard surfaces rather than simply mowing down macroalgae. A distinction worth knowing when you're planning its role in a reef system. That grazing behavior makes it genuinely useful in a display tank, helping keep nuisance film algae from taking hold on rockwork and glass. The white tail is the most reliable field mark, contrasting with the otherwise darker body in a way that makes it easy to pick out from similar species. It stays on the smaller side for a surgeonfish, but it still needs meaningful horizontal swimming space and is best suited to keepers who have some experience managing tang health and reef water quality.