How does a great white shark keep warm or cool?

A great white shark is a type of fish called a poikilotherm, or "cold-blooded" animal. This means that its body temperature is determined by its surroundings. Great white sharks live in the ocean, which is a relatively stable temperature. This means that their body temperature does not fluctuate much.

However, great white sharks do have some adaptations that help them to regulate their body temperature. For example, they have a thick layer of blubber that helps to insulate them from the cold. They also have a special blood vessel system called a retia mirabilis, which helps to conserve heat.

Great white sharks are also able to move to different parts of the ocean to find the ideal temperature for their body. For example, they may move to warmer waters during the winter and cooler waters during the summer.

In addition, great white sharks are able to adjust their metabolism to help them regulate their body temperature. For example, they may slow down their metabolism during the winter when food is scarce and speed up their metabolism during the summer when food is more plentiful.

These adaptations allow great white sharks to survive in a wide range of ocean temperatures. They are able to keep warm or cool, depending on their environment, and they are able to find the ideal temperature for their body.