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Superfish: Bluefin Tuna

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Giant bluefin swimming under boat. With the ability to regulate its body temperature, the bluefin is an evolutionary marvel. Being warm-blooded opens the doors for the fish to hunt in any type of water.
It is a giant among fish. Few have filmed it in the wild. For marine biologist and wildlife cameraman Rick Rosenthal, documenting the bluefin became the ultimate challenge.

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