Sand tiger shark embryos eat each other in the womb as a…

Sand tiger shark embryos eat each other in the womb as a paternity strategy. DNA testing revealed that the mystery of baby shark cannibalism is due to embryos from different fathers competing to be born. If there are two embryos with the same father, they will eat all the others so they can both live, which strengthens their bloodline. source

image via pixabay

Source: Weird Facts
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