Saturday, 15 April 2017

A Shark-Eat-Shark World

Female sand tiger sharks can have about 12 baby sharks growing inside them during pregnancy, but they only give birth to 2 - so what happens to the others?

Something bad happens! The first baby shark that gets big enough to break out of its egg capsule eats it's smaller brothers and sisters while still in the uterus! (This is called "embryonic cannibalism")

Embryonic Cannibalism - Baby shark eats siblings

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