In shark womb, fetus ‘cannibalizes’ rivals

IT was the biggest surprise of Stewart Springer’s life. Mr. Springer, a veteran shark researcher, was in his laboratory dissecting a sand tiger shark that he had caught near Chandeleur Island, off Louisiana. To his consternation, when he reached into one of the animal’s oviducts, or birth canals, he was bitten. Each oviduct contained a living, nine-inch shark pup.

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