No; they have no mechanism by which they regulate or maintain a specific temperature. They tend toward the ambient temperature of their surroundings.
A thermostat is supposed to maintain a constant temperature or temperature range in an area or for a device.
"Regulate" is a word that can be used to describe maintaining a constant temperature.
How do are body's maintain a constant temperature?
homeostasis
Animals that maintain a constant body temperature are called "endotherms." This means they can regulate their internal body temperature regardless of the external environment. This ability allows them to thrive in a variety of habitats and climates.
To maintain constant the temperature if necessary.
xsar
If the temperature of the gas is decreasing, then in order to maintain constant pressure, you would have to compress it in volume.
Goldfish are ectothermic animals, meaning they cannot regulate their body temperature internally like mammals. Instead, their body temperature fluctuates with the surrounding water temperature. As the water temperature changes, goldfish adjust their metabolic processes accordingly, but they do not maintain a constant body temperature.
Endothermic animals maintain constant body temperature in a number of ways. One way is to lay out in the sun.
The tropical rainforest biome typically has a more constant temperature due to its proximity to the equator. The consistent sunlight and high levels of humidity help maintain a stable temperature range.
Warm-blooded animals.