Global warming and climate change are growing environmental concerns. The potential impact on freshwater and marine fish is immense, because most fish have no physiological ability to regulate their body temperature. This volume focuses on the effects of temperature at all levels of organization in fish, with particular emphasis on physiological function: cells, epithelia, organ systems, the whole organism, reproduction, behavior, pollutant interactions, ecology and population dynamics. Written by experts in the field, many chapters also speculate on the long-term physiological and ecological implications to fish of a 2-4oC global warming scenario over the next half century.