Lined Surgeonfish Identification Guide
Spot this bold reef tang by its alternating blue-black and orange horizontal stripes and fiercely territorial habits.
Read the full Lined Surgeonfish encyclopedia entry →
Key identification features
- Deep, oval body patterned with alternating blue-black and orange-yellow horizontal stripes on the upper flank
- Bright yellow lower body and belly
- Blue-edged dorsal and anal fins that echo the body stripes
- Blue ring surrounding the white caudal spine at the base of the tail
- Head and snout duller brown, contrasting with the vividly striped body
- Fairly small adult size, typically under 38 cm
Common look-alikes
Convict surgeonfish has bold vertical black bars on a pale grey body rather than horizontal stripes. Clown surgeonfish shares bright colors, but its stripes curve and break into a busier, more mottled pattern. Zebrasoma tangs have a similarly bold appearance but a narrower body and a pointed, forward-projecting snout that lined surgeonfish lacks, along with a different overall stripe orientation.
Where you'll see one
Lined surgeonfish favor shallow, high-energy reef crests, surge channels, and reef flats across the Indo-Pacific, where individuals aggressively defend patches of algae turf against nearly any other grazing fish that intrudes, making their territorial chases another useful clue for identification.
Frequently asked questions
How do I tell a lined surgeonfish from a convict surgeonfish?
Lined surgeonfish has horizontal blue-black and orange stripes, while convict surgeonfish has vertical black bars on a plain grey-white body.
Why does a lined surgeonfish sometimes chase other fish off a reef?
It is fiercely territorial over algae turf and will charge other grazers, which is itself a useful behavioral clue alongside its striped pattern.