Yoko the swell shark was born in a habitat of all-female sharks who hadn't seen a male in years. The aquarium has two possible explanations — and hopes to get confirmation in the coming months.

Officials at a Louisiana aquarium are investigating the mystery of a swell shark baby that hatched despite its mother having ...

With some, like the zebra shark and whitespotted bamboo shark ... genetic testing once Yoko is the "suitable size" for a blood draw, likely in a few months. Barrick told NPR that the aquarium ...