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.

According to the aquarium, the shark egg was first spotted eight months ago. The shark hatched a few weeks ago and the team at the aquarium is working to determine how it was conceived. Once the shark is big enough for a blood draw,

Last February, a similar situation occurred in Hendersonville, North Carolina, when a stingray at the Aquarium & Shark Lab was found to be pregnant despite living in a tank without a male of her species. The aquarium determined the stingray, Charlotte, had developed a rare reproductive disease that negatively impacted her reproductive system.

The pup hatched in a tank housing two female sharks who hadn't been around any male sharks in over three years.

The egg was discovered eight months ago but the Shreveport Aquarium believes it may have gone undetected for an additional two months. The team said the two female sharks present in the tank had not been in contact with a male for more than three years,

In a remarkable development, the Shreveport Aquarium has announced the hatching of a healthy female swell shark pup named Yoko. This event is particularly intriguing as it occurred without male sharks,

Officials with the Shreveport Aquarium recently announced the unusual birth of a swell shark pup in a tank where only two female sharks were present.

Nature is capable of some pretty incredible phenomena and even a few mysteries. That's become all the more apparent recently at Shreveport Aquarium in Louisiana, where the team is celebrating the hatching of an egg that seems to have only one parent.