We report the first high-precision temperature measurements of individual methane seeps in the Zelenka methane seep field, achieved with an accuracy of 0.003 degrees C, a sensitivity of 0.001 degrees C, and a sampling interval of 2 seconds. This paper reviews previous Bulgarian research on underwater gas seeps, with a particular focus on the extensively studied shallow methane seep field at Zelenka, located west of Cape Kaliakra. We discuss the feasibility of temperature-based monitoring and emphasize the necessity of temperature measurements as an integral component of underwater methane seep surveillance