Thirteen taxa of Rhodophyta, Phaeophyta and Chlorophyta are reported for the first time from Inhaca Island: Gelidiopsis repens, Solieria robusta, Tricleocarpa cylindrica, Dictyota humifusa, Padina boergesenii, Sargassum crassifolium, Stoechospermum polypodioides, Caulerpa microphysa, Cladophora catenata, C. coelothrix, C. vagabunda, Rhizoclonium.