Acanthurus leucosternon is a marine tang known as the powder blue tang, recognized for its vivid blue body, yellow dorsal fin, dark face, and bright white chest that create one of the most striking color patterns among reef fishes. In the wild, it inhabits clear coral reefs and rocky slopes of the Indian Ocean, where it actively grazes on algae over reef surfaces while using open swimming space and reef structures for both movement and shelter. In aquarium care, Acanthurus leucosternon is admired for its exceptional beauty and algae-grazing behavior, but it requires a spacious, mature marine system with highly stable water quality, strong oxygenation, abundant vegetable-based foods, and careful attention to stress, territorial aggression, and common health problems such as marine ich.
