Sajal Ray received his MSc and MPhil degrees from Calcutta University in Zoology and Environmental Science respectively and was awarded PhD from Jadavpur University. His thesis reported immunotoxicity of pesticide in an economically important snail of India. As an awardee of Fogarty Visiting Fellowship, Dr. Ray carried out his postdoctoral research in Cardiac pathology at National Institutes of Health, USA. His research interest is studying the immunological responses of molluscs, sponge, crab and earthworm exposed to pollutants. His team is engaged in understanding the evolutionary mechanism of immunity in phylogeny. He presented his research at various conferences including the World Congress of Malacology at Washington D.C. Sajal Ray, currently a Professor of Zoology at Calcutta University has been teaching Zoology for nearly thirty years at postgraduate level.