This month newsletter brings you another excerpt from our book on the biodiversity of Rameshwaram - Gulf of Mannar region. Here we present the different turtles as well as the biodiversity inherent in the corals of the region. The Gulf of Mannar region provides a very interesting heterogeneous group of flora and fauna. From this region about 3600 species have been identified. Of this, 186 species are commercially exploited, 116 are vulnerable and 7 are considered as endangered. In the case of fishes of the 2200 fish species distributed in Indian waters, 441 species have so far been recorded in Gulf of Mannar. Gulf of Mannar is one of the best regions in the Indian region in fish biodiversity richness.