Cyanobacterial Biodiversity at Marine environment from Thondiyakadu, Thiruvarur District, South East Coast of India.

India is one of the mega biodiversity country in the World, having almost all possible kind of climatic bariations with a great diversity of microbes especially the Cyanobacteria. Marine Cyanobacteria were isolated from water samples of Thondiyakadu coast and Valavanaru estuary located at Muthupet Mangrove environment, south east coast of India. Totally thirty five marine Cyanobacteria were isolated by spread plate method of ASN III agar medium. Physico chemical parameters of the water samples were analysed. The maximum number of Cyanobacterial species in both of site areas such as Osillatoria acuminata, O.animalis, O.brevis, O.formosa, O.okemi, O.limosa, O.limetica, O.rubescens, O.saline, O. subbrevis, Lynbya confervoides, L.majuscula and L.putealise, were recorded.