FOX News: It's a shark eat shark world, photo reveals

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It's a shark eat shark world, photo reveals Aug 16th 2013, 12:18 British Prime Minister Winston Churchill called Russia a "riddle, wrapped in a mystery, inside an enigma." John Madden, the football announcer, used the word "turduken" to describe a chicken stuffed inside a duck stuffed inside a turkey. Here's an oceanic enigma: What's the word for a bait fish stuffed inside a dogfish shark, stuffed inside a sand tiger shark (Carcharias taurus)? SEE ALSO: Top 5 Reasons Sharks Are in Trouble University of Delaware shark scientists faced that question after a large sand tiger shark completely swallowed a smooth dogfish (Mustelus canis). The three-foot dogfish, a type of shark, had itself devoured the menhaden (Brevoortia sp.) bait fish that the researchers had placed on a fishing line. ANALYSIS: Shark on NYC Subway: Identified The marine version of matryoshka dolls happened while researchers attempted to recapture sharks that they had previously tagged with radio transmitters in Delaware Bay. The University of Delaware's Ocean Exploration, Remote Sensing, Biogeography Lab tags and tracks the tiger sharks to improve human understanding of shark migration. Sharks face intense threats to survival worldwide and documenting shark movements may improve conservation efforts.

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