The marine diatom based biodiesel may be the greatest possible options for future energy, particularly for India where land resources and freshwater are limited. In the above context, an attempt has been made to isolate the marine diatom Odontella aurita from Vellar estuary, South east coast of India and characterized for biodiesel production. Identification of microscopic structure, morphology was succeeding by bright field microscope and SEM. | Lipid screening extraction and production of biodiesel from marine diatom Odontella aurita