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Marine Science
Deep in the ocean, the world's first known warm-blooded fish
Deep in the ocean, the world's first known warm-blooded fish

Scientists have found the first known example of a fish with warm blood. The large circular fish is called an opah, or sometimes a moonfish, and researchers have determined that it can keep its internal temperature 5 degrees Celsius warmer than its environment. "We were shocked," said Heidi Dewar, a fisheries research biologist at the National Oceanic and Atmospheric Administration who worked on the study published Thursday in Science. "How often do you get to find something that no other fish has? It is a once-in-a-lifetime opportunity." There are other fish in the sea capable of elevating the temperature of specific parts of their bodies. For example,...

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