Carbon Dioxide, Volume 37 in the Fish Physiology series highlights new advances in the field, with this new volume presenting interesting chapters on a variety of topics, including Historic, current-day and future CO2 environments and their dynamics in marine and freshwater ecosystems, CO2 sensing, Acid-base physiology and CO2 homeostasis: regulation and compensation, CO2 and calcification processes in fish, The physiology of behavioral impacts of high CO2, Effects of high CO2 on metabolic rates, aerobic scope and swimming performance, Internal spatial and temporal CO2 effects: feeding and alkaline tide, O2 in aquaculture: CO2 dynamics and fish health, and much more.