Also known as Leatherjacket, Rough Leatherjacket, Triggerfish, Triggerfish Durgon, Unicorn Leatherjacket, Unicorn Leatherjacket Filefish, Yellow-finned Leatherjacket.
Found singly, pairs or in small schools under floating debris over shallow water drop-offs and sandflats close to deeper waters.
They feed on detritus and benthic invertebrates.
Juveniles often close to large sea jellies
Varies in colour with age.
Length - 75cm
Depth - 1-80m
Filefish can alter their colour and pattern to match their surrounds and so deter predators.
Although closely related to the Triggerfish, their "trigger spine" cannot be locked into place. Ref: https://www.fishbase.se/summary/Aluterus-monoceros