Natal Knifejaw

Oplegnathus robinsoni

The Natal Knifejaw, also known as Oplegnathus robinsoni, is a reef-associated fish endemic to the east coast of South Africa and Mozambique. Adult Natal Knifejaws are characterized by their grey-brown to dark brown coloration, while juveniles are distinctively yellow with vertical black stripes. They possess a parrot-like beak which aids in tearing organisms off surfaces, a feature that distinguishes them from similar species. This species inhabits coastal rocky and coral reefs, typically found in depths ranging from 20 to 100 meters. Juveniles are pelagic and can often be seen under floating objects at sea before they transition to shallow subtidal reefs. The diet of the Natal Knifejaw is varied, including ascidians, soft corals, and reef-encrusting organisms, as well as small fish, crustaceans, and cephalopods. Reproduction occurs during the warmer months from October to January, with spawning likely taking place throughout their distribution range. Although the conservation status of the Natal Knifejaw is not evaluated, fishing regulations limit the catch to five per person per day to help conserve the species. Divers encountering this fish may observe its feeding behavior and the coloration of juveniles.