Cape Kurper

Fascinating facts about the Cape Kurper

• At just 25 cm long and 200 g heavy, this modest-sized fish packs a vivid golden-brown coat with dark dorsal markings; males are more colourful than females.
• From the rocky rushes of the Coega River to the quiet, plant-laden margins of the Verlorevlei, it thrives in both fast currents and still pools, proving that flexibility in habitat choice can be a survival edge for endemic species.
• During South Africa’s summer, the male stakes out a substrate spot, decorates his body with dark vertical bars and black fins, then blows bubbles to lure a female, and after spawning the male alone guards the eggs and fry.
• When hooked, it can play dead for a moment before wriggling free as soon as the hook is lifted, a sly escape act that reminds anglers the river’s residents are tougher than they look.
• Genetic scans have uncovered at least two, possibly more, hidden lineages within what we call this single species, suggesting we may be looking at several secret cousins hidden in the same rivers – a reminder that biodiversity can hide in plain sight.

At a glance

About the Cape Kurper

The Cape kurper (Sandelia capensis) is a striking member of the climbing gouramis, reaching up to 25 cm and 200 g. Its body shimmers in shades of yellow to golden brown, punctuated by dark dorsal markings that spill onto the dorsal and anal fins. Males turn up the colour palette during the breeding season, flaunting intensified hues, dark vertical bars, and a blackened lower mandible, while females retain a more subdued tone. This fish navigates the coastal rivers of South Africa’s Western and Eastern Cape, from the Coega River at Algoa Bay through the Cape Flats up to the Verlorevlei River, and even the introduced Clanwilliam Olifants system. It thrives in a mosaic of habitats, rocky, swift streams and languid, vegetated waters, yet it favours quiet marginal zones where submerged roots, branches, and aquatic plants offer shelter. A versatile predator, the Cape kurper snaps up insects, other invertebrates, tiny fish, and crabs, displaying the opportunistic feeding style typical of Anabantidae. In the southern summer, males claim a substrate site, defend it aggressively, and perform a bubble-blowing courtship that culminates in a vigorous chase and spawning ritual. After the female deposits adhesive eggs, the male assumes sole guardianship, tending the clutch and the fry that cling to the substrate. Anglers sometimes witness a dramatic ‘playing-dead’ act, only for the fish to wriggle free once the hook is removed, a testament to its cunning survival tactics.

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