The Western Indian Ocean (WIO) region has valuable and diverse coastal and marine resources, but much of its natural capital is either threatened or declining. The WIO encompasses rich diverse tropical and subtropical areas along the coastlines of Somalia, Kenya, Tanzania, Mozambique and South Africa. This region also comprises vast oceanic areas and the island states of Madagascar, Seychelles, Comoros, Mauritius and Réunion. This paper focuses on the marine and coastal governance of mainland states in the region.