Our water table system is a temperature-controlled experimental platform designed to maintain multiple aquaria under stable and homogeneous thermal conditions during experiments with live marine invertebrates. The aquaria are partially immersed in a common circulating water bath, with temperature regulated by an external heating/chilling unit. The system is particularly suitable for controlled laboratory experiments investigating physiological responses, stress, metabolism, behavior, and the effects of environmental change and anthropogenic pressures under precisely regulated temperature conditions.