Sharks are supposed to be the apex predators of the ocean, so how could a 2.2-metre long pregnant shark seemingly get killed and eaten off the coast of Bermuda?
That is the question a team of US scientists was faced with when the porbeagle shark's tracking device suddenly popped to the ocean's surface off the coast of Bermuda 158 days after it was put on.
Porbeagle sharks are active, large and powerfully built predators growing up to 3.7 metres long and typically living for 30 years or more. The researchers could come up with only one explanation: the unfortunate porbeagle had been eaten by a larger predator and spent four days being digested, before the tagging device was excreted and rose to the ocean's surface.
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