Eyestripe Surgeonfish

The Eyestripe Surgeonfish is a large, impressive member of the Acanthurus genus, immediately recognizable by the distinctive bright yellow stripe that runs horizontally through the eye, contrasting sharply against its gray to brown body. This species has a laterally compressed, oval body typical of surgeonfish, with fine blue-gray lines along the flanks and a prominent scalpel-like spine at the base of the tail that can be raised defensively. At a maximum size of approximately 21 inches, it is one of the largest commonly encountered surgeonfish and demands a substantial aquarium to accommodate its adult bulk and active swimming habits.

In the wild, Acanthurus dussumieri is found across an enormous range spanning the entire Indo-Pacific, from the coast of East Africa through Indonesia and the Great Barrier Reef to Hawaii and Japan. It inhabits outer reef slopes, channels, and lagoons, typically at moderate depths where it roams across sandy and rubble areas grazing on filamentous algae, diatoms, and detritus. Juveniles tend to stay in shallower, more sheltered areas and gradually move to deeper habitats as they grow. The species is often observed in small groups or loosely associated aggregations.

Due to its impressive adult size, the Eyestripe Surgeonfish requires a minimum aquarium volume of 180 gallons, though larger systems of 250 gallons or more are strongly recommended for long-term housing. It is a moderately hardy species that adapts reasonably well to captive conditions, making it suitable for intermediate aquarists with appropriately sized systems. Like all Acanthurus tangs, it is susceptible to marine ich and should be quarantined before introduction to the display tank. It is completely reef-safe and serves as an effective algae grazer. Its semi-aggressive temperament means it may quarrel with other tangs, particularly those of similar shape or size.