The present study is based on the material collected from three different centres along the coast of Mozambique during the year 1969 by Prof. J. Bouillon, Université Libre de Bruxeiles, Belgium. Most of the specimens were from Inhaca Island but some from Mambone and Paradise Islands were also represented in the sample. Considering the geographical separation of Inhaca Island and the other two places mentioned above, this report is split up into two parts; the first part deals with the sponges of Inhaca Island and the second part, the sponges of Mambone and Paradise Islands.