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Description of the previously unknown male of Caligus mortis Kensley, 1970 (Copepoda: Caligidae), parasite of intertidal fish from South Africa.

Caligus mortis Kensley, 1970 was originally described from females collected from intertidal pools along the coast of Namibia. During surveys at Jeffreys Bay and De Hoop Nature Reserve in South Africa, both females and males of C. mortis were collected from intertidal pool fish hosts. Based on this material a full description of the male is given, and a comparison with the female reveals the sexual dimorphic characteristics.