Description

Also known as Doctorfish, Lancetfish, Thorntail, Thorntail Fish, Whitefin Surgeon.

Found singly or in small schools, over steep, outer reef slopes.
They feed on zooplankton.
Length - 33cm
Depth - 5-20m
Widespread Western Pacific

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 defence and are as sharp as a surgeons scalpel, hence the name "Surgeonfish".
Some species are venomous. Ref: https://www.fishbase.de/summary/13770