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What is the temperature of a fish inside the water?

4 Answers

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The temperature of the water and the surrounding environment typically determines the internal temperature of a fish, which can range from around 38-60°F or 3-15°C depending on the species of the fish and the temperature of the water.
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The temperature of a fish inside the water can vary depending on the water body and environmental conditions. It typically matches the temperature of the surrounding water, which can range from freezing temperatures in cold waters to warmer temperatures in tropical regions.
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The internal body temperature of fish in water varies and generally matches the temperature of their surrounding environment. Fish are ectothermic creatures, commonly known as cold-blooded animals, meaning they cannot regulate their body temperature internally. Instead, they rely on external factors, like the water temperature, to maintain their body temperature.

The body temperature of a fish typically closely mirrors the temperature of the water in which they reside. If the surrounding water temperature changes, the body temperature of the fish will adjust accordingly. This is why fish in cold water environments, like polar regions, tend to have lower body temperatures compared to fish living in warmer waters.

In some specific cases, certain fish species, such as tunas and some sharks, have the ability to elevate their body temperature above that of the surrounding water, termed regional endothermy. They achieve this by having special physiological adaptations that help them generate and retain internal heat, allowing them to maintain higher body temperatures in specific parts of their bodies compared to the surrounding water.
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The internal body temperature of a fish inside the water is typically very close to the temperature of the surrounding water. Fish are ectothermic, meaning they cannot regulate their body temperature internally, so it closely mirrors the temperature of the water they inhabit.
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