As per the Responsible Angler Guidelines, responsible recreational fishers are requested to not retain but rather tag and release any species caught that are listed as Endangered, Threatened or Vulnerable on a local species list (E.g. National Biodiversity Assessment) or an international list (E.g. The IUCN Red List of Threatened Species).
Natal knifejaw (Oplegnathus robinsoni) are slow growing fish distributed along the coastline of South Africa from the Eastern Cape to KwaZulu-Natal, moving towards Mozambique. Natal knifejaw were nationally listed as Data Deficient in the 2018 National Biodiversity Assessment. This species is rated as a no-sale species within South Africa, only recreational fishers with a permit may catch them following a daily bag limit (5 pp/pd). Recreational fishers are not allowed to sell their catches.