Resmi P¹, Anu Gopinath², Abel Varghese³, Arya K S Ms⁴, Gireeshkumar T R Dr⁴, Ms. Arya P Kumar² and Resmi.P; Anu Gopinath; Arya K S, Gireeshkumar T R, Arya P Kumar, Abel Varghese, (1)Kerala university of fisheries and ocean studies, Aquatic Environment Management, Kochi, India, (2)Kerala University of Fisheries and Ocean Studies, Department of Aquatic Environment Management, Kochi, India, (3)Fishery Survey of India, Port Blair, Andaman and Nicobar Islands, India, (4)National Institute of Oceanography, RC-Kochi, Kerala, India, Chemical Oceanography, Kochi, India