Researchers stunned by what ate huge great white - San Diego, California News Station - KFMB Channel 8 - cbs8.com

Researchers stunned by what ate huge great white

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SAN DIEGO (CBS 8) - A mystery predator is lurking in the deep.

Researchers want to know what ate a nine-foot great white shark. One theory? A colossal, cannibal great white shark did it. But some are not convinced.

Filmmaker Dave Riggs was documenting a tagging project for great white sharks when one of the sharks became the center of a mystery. It was a nine-foot great white shark that was tagged off the coast of Australia in 2003. Researchers named her Alpha, but never saw her again -- only her tag four months later.

Researchers studied the tag and found it had dramatically changed temperatures from 46 degrees to 78 degrees Fahrenheit. An upcoming documentary concludes the temperature change meant Alpha had been inside another creature’s stomach.

Martin Graf has been diving with sharks for 14 years and he’s a little skeptical about a 16-foot, two-ton super predator.

"Could it be true? Possibly, but to me it's very far-fetched," he said. "Even if this super predator were to exist, it would have taken a while for that tag to record a higher temperature."

He says it’s more likely that the tag just fell off and Alpha may still alive, still safe from a so-called super predator.

"To conclude that it died and it was taken by this super predator… determined the size and weight of that super predator, to me that's just totally irresponsible," Graf said.

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