Redeye Labeo

Fascinating facts about the Redeye Labeo

• From the Zambezi to the Pongola, this fish lives in East African rivers and also appears in the upper and middle Congo, showing its range spans several major drainage systems.
• At just 23 cm (9.1 in) long, the fish sports a cylindrical body and a protruding snout dotted with star-shaped tubercles. Its large, fleshy-lipped mouth and bright red eyes give it a distinctive look among African cyprinids. These traits help it scrape algae off rocks, a feeding habit that keeps river surfaces clean.
• The fish favors clear, fast-flowing water over rocky substrates, whether in small streams or large rivers, and also occurs in lakes and dams with similar rock zones.
• Its diet consists mainly of diatoms and other tiny algae that grow on rocks.
• When it’s time to breed, the fish migrate upstream in masses, using their mouths and broad pectoral fins to cling to damp rock faces and climb over weirs to reach spawning grounds.

At a glance

About the Redeye Labeo

The redeye labeo, also known as the African carp (Labeo cylindricus), is a sleek, cylindrical fish distinguished by a protruding snout adorned with star-shaped tubercles and fleshy, oversized lips. Its body shimmers in shades of yellow-green, crossed by a darker horizontal band, while older individuals take on a deeper olive-grey hue. The most arresting feature, however, is the vivid red eye that gives the species its common name, and at full size the fish reaches about 23 cm (9.1 in). In the clear, fast-flowing waters of East Africa’s great river systems, from the Zambezi through the Limpopo and Komati to the Pongola, and even the upper and middle Congo, this labeo thrives among rocky substrates. It scrapes diatoms and minute algae from stone surfaces, a diet that fuels its energetic migrations. During breeding season, massive upstream movements turn the rivers into living ladders, as the fish use their powerful mouths and broad pectoral fins to cling to damp rock faces and weirs, scaling barriers with a determination that seems almost amphibian. This climbing behaviour, a surprising trait among cyprinids, underscores the redeye labeo’s remarkable adaptation to a dynamic, rheophilic world.

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