Abstract

• A total of 19 species of marine benthic algae belonging to 13 families of 11 orders collected from the Sittwe Coastal Areas (lat. 20º 09´ N, Long. 92º 54´ E), Rakhine Coastal Region from December 2021 to August 2022 were identified. The identification of species was carried out based on the external and internal morphologies, herbarium, and living plants in the field. In the present study, 10 species, 9 genera of Rhodophyta, 5 species, 2 genera of Chlorophyta and 4 species, 4 genera of Phaeophyta had been identified. Among these algae, Bangia atropurpurea, Catenella impudica, Polysiphonia subtilissima, Ulva flexuosa, Ulva clathrata and Colpomenia sinuosa were newly recorded for Sittwe Coastal Areas. Compsonema serpens and Chondracanthus intermedius were first recorded for Myanmar. The descriptive key emphasized to the species of these algae was provided. A brief note on the potential uses of each alga was described. Some ecological notes of these species were briefly described.