Paternity test reveals father’s role in mystery shark birth
![brownbanded bamboo shark](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/01/wt_sz_shark_0.jpg?fit=860%2C477&ssl=1)
This brownbanded bamboo shark was born in a tank containing three adult female sharks — and no males. A genetic study showed that the pup does have a dad, though. Mom stored his sperm for years.
California Academy of Sciences