Surgeonfish have a blade like spine in the tail that points outwards when bent, unicorns have two hook-like plates along the tail, these are used for defense and are as sharp as a surgeons scalpel, hence the name “Surgeonfish”. Some species are venomous.
Found singly or in small schools, amongst large corals, over clear, inner reef crests, gutters, and slopes, rich in algae growth.
They feed on algae.
Length – 16cm
Depth – 1-20m
Widespread Indian Ocean