Istigobius hoesei
Common on shallow reefs in New South Wales, this 4cm goby sits tight on sand at 5-7m in 20-22C water year-round.
A small, slender goby that tops out around 4cm, so easy to overlook unless you slow down and scan bare sand or rubble patches. Body colour is a mottled sandy grey-brown that blends closely with the substrate it perches on, broken by faint darker speckling along the flanks. It rests propped on its pelvic fins rather than swimming freely, and holds still long enough for a close look once you spot it.
Look for it perched motionless on open sand or rubble in the shallows, usually in the 5 to 7m range where light still reaches the bottom well. It tends to hold its ground rather than bolt when a diver approaches, darting only a short distance before settling again on the substrate. Most sightings are on the reef floor rather than up in the water column, so this is very much a slow, close-focus, look-down kind of find.
Like other sand gobies, it likely relies on camouflage rather than flight to avoid predators, freezing against the sediment instead of fleeing far when disturbed.
Sightings show no detectable seasonal pattern, and with a narrow observed temperature niche of 20.2 to 21.8C it seems to hold steady on the same shallow sand and rubble patches year-round.
Every logged sighting of this goby comes from Australia, and specifically New South Wales, making it a solidly local target rather than a widespread reef fish. Divers looking for it should focus on shallow NSW sites rather than further north on the Great Barrier Reef or elsewhere in the Indo-Pacific.
Mapping where Hoese's Sandgoby is logged…
Sightings are concentrated in New South Wales, Australia, where it turns up regularly on shallow sand and rubble patches. It has not been logged elsewhere in the available diver records.
There is no clear seasonal pattern in sightings, so it appears to be present year-round on the shallow reefs where it lives, consistent with water temperatures logged between about 20 and 22C.
Look for a tiny, sandy-brown goby around 4cm long, resting on open sand or rubble rather than swimming in open water. Its mottled colouring matches the substrate closely, so it is easier to spot once it moves or you slow your search pace.
They are small, reaching only around 4cm in length, which puts them firmly in macro-photography territory rather than a fish you will spot from a distance.
No, they pose no danger to divers. They are small, sedentary bottom-dwellers with no venom or aggressive behaviour to worry about.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
Slender Goby
803 sites
