I have been actively involved in the field of environmental toxicology for over 35 years conducting research primarily on the effects of metals on aquatic organisms. I continue to be very interested in this field, particularly in improving our understanding of the physiological mechanisms of metal toxicity and using this information to develop tools for regulating metals in the environment. Translating our physiological understanding of how toxicants affect different levels of biological organization into practical tools that can be used by environmental managers and regulators is an ongoing challenge.