Caesioperca rasor
Barber Perch shoal over South Australia and Victoria reefs in 12.6 to 18.8 C water, a year-round temperate sighting.
A slim, torpedo-shaped fish around 17 cm, usually seen hovering in loose groups just off rocky reef rather than sitting on the bottom. Colouring runs orange to reddish-brown, fading paler on the belly, with translucent fins that give it a fine, almost see-through edge in open water. Look for the forked tail and the way it holds mid-water, facing into current, rather than darting between crevices like a wrasse.
Divers most often find Barber Perch hanging in loose, mixed-age shoals above reef structure, feeding on drifting plankton rather than picking at the substrate. They hold their position in the water column with minimal fuss and tend not to bolt at the sight of a diver, though they will drift back a metre or two if approached too directly. Expect to see them at most times of day on temperate reef and rocky drop-offs rather than tucked into caves or overhangs.
Like many anthiadid fishes, Barber Perch shoal in loose groups that feed by picking plankton straight out of the water column, a strategy that keeps them hovering rather than grazing the reef surface.
Sightings are logged across the year with no clear seasonal spike, which fits a fish comfortable across a fairly wide 12.6 to 18.8 C range typical of temperate southern Australian waters. Plan around good visibility and calm conditions in your chosen region rather than a particular month.
Reef neighbours a diver could mistake it for. Use the identification notes above to tell them apart.
This is a southern Australian fish through and through, with South Australia and Victoria the strongholds and solid numbers also logged in Tasmania. Western Australia turns up a reasonable spread of sites too, while New South Wales sightings are scarce by comparison.
Mapping where Barber Perch is logged…
South Australia and Victoria have the strongest logged numbers, with Tasmania and Western Australia also reliable. Sightings thin out further north into New South Wales.
There is no strong seasonal pattern in the sightings, and the species tolerates a wide 12.6 to 18.8 C range, so it is essentially a year-round fish on southern Australian reefs.
Look for a slim orange-brown fish around 17 cm hovering in loose shoals over rocky reef, with translucent fins and a forked tail. It holds mid-water facing into current rather than hiding in crevices.
Barber Perch typically reach around 17 cm in length, a modest size that keeps them shoaling for safety rather than patrolling reef alone.
No, Barber Perch pose no threat to divers. They are a peaceful plankton-feeding shoaling fish that will simply drift away if you get too close.
They feed by hovering in the water column and picking plankton directly from passing current, rather than grazing algae or invertebrates off the reef like many similarly sized fish.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
Red-cheeked Anthias
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