Thermal biology studies the influence of the ambient temperature on the organism and its adaptation on thus. The temperature is transmitted in three ways: by conduction (convection), evaporation and radiation. Air temperature influence differs from influence of the water temperature. The water has a higher conductivity coefficient and its cooling effect through conductivity is higher. Aquatic organisms can stay in warmer regions or develop anatomical and physiological adaptations to the cold environment. These adjustments include increased metabolic rate, thermal insulation provided by blubber and countercurrent heat exchange. To increase the metabolic rate and create a layer of blubber, a large amount of food to store as chemical energy is needed. Only the leatherback turtle has developed such adjustments, and is the only living turtle species that doesn’t suffer from cold stunning in waters whose temperature is below 10°C. All sea turtles nest on tropical beaches, except for the loggerhead which prefers subtropical and temperate seas. The temperature inside the nest affects the sex ratio and the survival of individuals within the nest. Climatic changes will affect the nesting period and the nesting site, as well as the survival rate of individuals in the nest. Climate changes will lead to the extinction of species of sea turtles which are unable to successfully adapt.