Mystery of 'virgin' shark birth: Aquarium is baffled after a baby is born in an all-female tank
Aquarium staff in Louisiana have been left baffled by a miraculous 'virgin birth' in their shark exhibit. 'Yoko' the young swell shark (Cephaloscyllium ventriosum) was born in an all-female tank at Shreveport Aquarium. Amazingly, the two female sharks in the tank – one of which is Yoko's mum – had not been in contact with a male in more than three years, staff said. And with the gestation period of swell sharks at somewhere between nine and 12 months, this means conception must have occurred some other way.
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