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,

In a rare case of fertilisation, a shark was born in an aquarium without the presence of a male specimen, causing a stir in the scientific community as they investigate the unusual occurrence. The egg was discovered at the Shreveport Aquarium in Louisiana,