The Speedy Cold-Hearted Tuna

The video explores how fish, particularly the Pacific Bluefin tuna, regulate their body temperature in cold waters. While most fish are ectothermic, relying on external temperatures, the tuna has evolved unique adaptations to maintain a warmer body temperature. This includes a complex network of veins and arteries that conserve heat, allowing them to thrive in both warm and cold environments. These adaptations make the tuna a fast and efficient predator, capable of extensive migrations and surviving in diverse temperatures.

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