Glaucosoma scapulare
Pearl Perch turn up as uncommon reef sightings off New South Wales in water around 20 to 25C, no strong season yet detected.
Look for a deep-bodied, silvery-grey fish around half a metre long with a noticeably large, dark eye and a slightly humped forehead. The body is fairly compact and oval in profile, without bold stripes or patches, so it reads as a plain, solid-looking reef fish against rock or sand. It tends to sit close to structure rather than out in open water, which helps separate it from more free-swimming reef fish of similar size.
Divers most often find it holding near reef structure, ledges and rocky overhangs rather than cruising open water, consistent with its reputation as a bottom-associated reef dweller. Sightings are logged as uncommon even at the sites where it occurs, so expect to search rather than stumble on it. It does not appear to react strongly to divers, more often just holding station near cover than fleeing or approaching.
It belongs to a small family, the temperate basses (Glaucosomatidae), a group with only a handful of species found mainly in temperate Australian and Indo-Pacific waters, which makes any sighting a bit of a family rarity for divers.
There is not enough seasonal data to call a peak month, so treat it as a year-round possibility on NSW reefs. Divers have logged it in water between 20.2 and 24.9C, a range typical of NSW's temperate seasons rather than a narrow window.
All logged sightings so far come from New South Wales, Australia, making it the region to target if you want a shot at this one. It is not yet reported from other countries in the diver data, so NSW's temperate reef sites are currently your best bet.
Mapping where Pearl Perch is logged…
Every logged sighting so far is from New South Wales, Australia, on temperate reef sites. It hasn't yet been reported from dive sites outside that region.
There isn't a detected season yet, so it's best treated as a year-round possibility on NSW reefs. It's been observed in water from about 20 to 25C, a range NSW divers see across several months.
Look for a deep-bodied, silvery-grey fish around 49cm with a large dark eye and a slightly humped head profile. It lacks bold markings, so its plain body shape and habit of holding near rocky structure are the main clues.
They typically reach around 49cm, a solid mid-sized reef fish rather than a giant.
No, they're not considered dangerous to divers. They're a calm, structure-associated reef fish with no venom or aggressive behaviour reported.
It's logged as uncommon even at the handful of sites where divers have found it, so sightings take some searching rather than being a guaranteed find.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
Barberfish
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