Marine organisms need to respond very rapidly to sharp environmental changes. While the ability to cope with stress depends largely on the information stored in their genes, the modulation of such information in response to environmental signals is governed by epigenetic regulatory mechanisms. Epigenetics is an exciting and relatively new discipline studying of the inheritance of modifications in the function of genes. The present talk aims to introduce audiences to a) the Epigenetics phenomenon, b) its relevance to study how marine organisms adapt to environmental changes and c) its potential application in pollution biomonitoring and conservation in the ocean. Lecture is $15, or $10 for Friends of Rookery Bay members, includes lunch.