Evan Bush is a science reporter for NBC News.
Just weeks before a pregnant porbeagle shark was expected to give birth, one of the two tracker tags marine scientists had placed on the animal floated to the surface near Bermuda. The team hadn’t expected the tag to surface for months. They had attached it to the 7-foot creature just 158 days earlier, after hoisting the shark onto a boat off the coast of Cape Cod, Massachusetts, in October 2020 and giving it an ultrasound. The pop-off tag was designed to stay on for about a year.
The researchers concluded that a white shark or shortfin mako shark must have munched on their pregnant porbeagle and ingested the tag temporarily. “I would guess this would have been a mature female white shark, probably 15-plus feet,” Anderson said. Before this, researchers didn’t think it was even possible that porbeagle sharks could be preyed upon, she added.
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