Description
A streamlined surgeonfish with a bluish-grey to olive body marked by a distinct dark blotch or patch near the rear body and tail base. It has the classic “scalpel” spine at the tail like all tangs. Active, hardy, and constantly grazing, it is built for life on open reef slopes and lagoons.
Lighting
Moderate to strong lighting
(Helps maintain natural coloration and supports algae growth)
Placement (Aquarium Zone)
Mid to upper water column
Requires large open swimming space and live rock for grazing
Temperature
24–28°C (75–82°F)
Salinity
1.020–1.025 SG
pH
8.1–8.4
Alkalinity
8–12 dKH
Diet
Primarily herbivore
Marine algae (nori, seaweed sheets)
Spirulina-based foods
Algae on live rock
Occasional mysis or brine shrimp
Adult Size (up to)
~25–30 cm (10–12 inches)
Care Level
Intermediate to advanced
(Requires space, stable water quality, and strong oxygenation)
Compatibility
Semi-aggressive (especially toward other tangs)
Best kept singly unless in very large systems
Reef-safe (does not harm corals)
Compatible with most medium to large reef fish
Avoid mixing with similar-bodied surgeonfish in smaller tanks
