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September 03, 2010, 03:10:39 AM
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Fish have long been thought to be cold blooded. Tuna and swordfish dive deep into the ocean where the water is very cold. Swordfish are able to raise the temperature of their brains and eyes, allowing for faster eye movements when hunting. Tuna are able to warm their entire bodies through a heat exchange mechanism called the rete mirabile, which helps keep heat inside the body, and minimizes the loss of heat through the gills. They also have their swimming muscles near the center of their bodies instead of near the surface. Submit new facts to the Webmaster |
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