Sand tiger sharks' fight for survival begins in the womb

05/1/2013 | Washington Post, The

Researchers have discovered that even in the womb, sand tiger sharks must fight to survive. A female may become pregnant with several males' offspring, but the more aggressive fetuses will eat their rivals in utero. Demian Chapman, lead author of the study and a marine biology professor at Stony Brook University, speculates the battles take place so the offspring of the most aggressive male shark survives.

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