Cremnochorites capensis
A small reef fish found across the Western Cape, logged at 44 sites, comfortable in cool water from 17.5 to 25.8C year-round.
A tiny reef fish, topping out around 6 cm, that perches motionless on rock rather than swimming in open water. Look for the mottled brown to grey camouflage pattern and the three separate dorsal fins that give triplefins their name, the rearmost fin noticeably taller. The head is blunt with large eyes set high, giving it a slightly bug-eyed look when you get close with a torch.
Expect to find it perched still on rock or in crevices rather than cruising, using its pelvic fins almost like little props to prop itself at an angle on the substrate. It tends to sit tight rather than bolt when a diver approaches, relying on its camouflage, so a slow scan of rocky surfaces with a torch is more productive than searching open water. Most sightings are logged as uncommon rather than common, so patience pays off.
Triplefins lack a swim bladder, which is exactly why they perch on rock instead of hovering in midwater like most reef fish.
There is no clear seasonal pattern in the sightings, and the water-temperature range it tolerates, 17.5 to 25.8C, spans most of what the Western Cape offers across the year. Treat it as a year-round find rather than something tied to a particular month.
Reef neighbours a diver could mistake it for. Use the identification notes above to tell them apart.
This one is a Western Cape speciality, with every logged sighting coming from South Africa and the region dominating the data entirely. If you are diving the reefs and rocky ledges around the Western Cape, this is one of the small residents worth slowing down to spot.
Mapping where Cape Triplefin is logged…
It is essentially a Western Cape, South Africa speciality, with sightings concentrated on rocky reef sites across that region. It has not been logged as a reliable find outside South Africa.
There is no strong seasonal signal in the sighting data, and its temperature tolerance of 17.5 to 25.8C covers most of the Western Cape's diving conditions year-round. It is best treated as a year-round resident rather than a seasonal target.
Look for a small, mottled brown fish around 6 cm long perched still on rock rather than swimming freely. The giveaway is three separate dorsal fins running along its back, with the last one taller than the others.
They stay small, typically reaching around 6 cm, which is one reason they are easy to miss unless you scan rocky surfaces closely.
Like other triplefins, it has no swim bladder, so instead of hovering over the reef it perches directly on rock using its fins almost like small legs. This is why divers find it sitting still rather than swimming past.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
Klipfish
1,860 sites
