Caffrogobius caffer
Small, mottled goby found on rocky reefs in the Western Cape, most often logged around Cape Town at 16 to 20C.
A small, thickset goby that rarely exceeds 13cm, with a mottled brown-to-grey body broken up by darker blotchy bands rather than clean stripes. It has the classic goby posture, propped on its pelvic fins on rock or sand rather than swimming freely in open water. The head is blunt and slightly flattened, with large eyes set high, useful for spotting it perched motionless against a similarly coloured rock.
Divers typically find it perched on rock ledges or wedged into crevices, staying still rather than cruising the reef. It's generally logged as uncommon rather than abundant, so it takes a bit of scanning along rocky substrate to pick one out, and it tends to hold its ground rather than bolt when a diver approaches slowly.
Like most gobies, it likely holds a small home territory on the reef, using camouflage rather than speed as its main defence against predators.
Sightings don't show a clear seasonal pattern, and the fish tolerates a wide range from 16.2 to 27.6C, so it's reasonable to look for it on Western Cape dives year-round rather than planning around a particular month.
Reef neighbours a diver could mistake it for. Use the identification notes above to tell them apart.
This is a South African speciality, and a reliable find on rocky reefs in the Western Cape, especially around Cape Town, where it turns up at the largest number of sites. It also shows up along the Eastern Cape coast, though less frequently, so Western Cape sites are the stronger bet for a sighting.
Mapping where Banded Goby is logged…
It's found almost entirely in South Africa, with the strongest sightings on rocky reefs in the Western Cape around Cape Town, and additional records along the Eastern Cape coast.
There's no strong seasonal signal in sighting data, and it tolerates a broad temperature range from 16.2 to 27.6C, so divers log it across the year rather than in one specific season.
Look for a small, mottled brown-grey fish under 13cm perched on rock rather than swimming in open water, with blotchy darker bands and a blunt head. It's easily overlooked against similarly coloured rocky substrate.
They're a small reef fish, typically reaching around 13cm in length, so they're easy to miss unless you're scanning rock crevices closely.
No, it poses no threat to divers. It's a small, sedentary fish that relies on staying still and blending into the rock rather than any form of defence against people.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
Slender Goby
803 sites
