Pempheris compressa
Copper-red schools tucked under ledges at 20-30m, most reliably logged around New South Wales in 17.4-22.7C water year-round.
A small, deep-bodied fish around 14cm, noticeably flattened side-to-side (compressed) with a coppery to reddish-brown colour and a large, dark, glassy eye that gives the species its name. It has a concave face profile and tends to hang in loose groups facing into the current under overhangs rather than swimming in the open. The big eye and slab-sided shape are the quickest tells against other schooling reef fish.
Found tucked into caves, ledges and under overhangs at 20 to 30 metres, usually loitering in small, loose schools rather than out on open reef. Divers most often log it as uncommon to common at a site, sitting fairly still or gently finning in place, and it does not scatter dramatically when approached slowly. It reads as a shy, shade-loving species that prefers structure over open water.
That oversized eye is a giveaway that it is built for low light, active around dusk and in the dim, sheltered nooks it schools in during the day rather than out on sunlit reef flats.
No clear seasonal pattern shows up in the sightings, and the observed temperature range of 17.4 to 22.7C spans NSW's cooler and warmer diving months, so it is worth looking for on any dive in the region regardless of season.
Reef neighbours a diver could mistake it for. Use the identification notes above to tell them apart.
Logged almost exclusively around New South Wales, Australia, where it turns up at reef sites in temperate rocky habitat rather than tropical coral reef. It is not a species you will find on a generic tropical checklist; think southeastern Australian reef and ledge diving specifically.
Mapping where Bullseye is logged…
Sightings are concentrated almost entirely in New South Wales, Australia, where it shelters under ledges and overhangs on temperate reef sites. It is not reported outside this region in current diver logs.
There is no detected seasonal peak, and it is recorded across a temperature range of 17.4 to 22.7C, so it appears to be a year-round sighting in NSW rather than a seasonal visitor.
Look for a small, flattened, coppery-red fish around 14cm with a large dark eye, usually seen loitering in a loose group under a ledge or cave mouth rather than out in open water.
They are a small species, typically reaching around 14cm, and are usually seen in schools of similarly sized fish rather than as solitary large individuals.
No, they pose no danger to divers. They are a shy, sheltering species that will hold position or ease back into a ledge rather than react aggressively to a diver nearby.
Its unusually large eye points to a lifestyle built around low light, likely feeding actively around dusk while spending daylight hours schooling quietly under overhangs and in caves.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
Anchovy
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