Stingray pregnant despite not sharing tank with a male for at least eight years

Kinsley Boyette, assistant director of the Aquarium and Shark Lab, poses with Charlotte (Aquarium and Shark Lab by Team ECCO/AP)

A stingray in a North Carolina aquarium is pregnant – despite not sharing a tank with a male of her species for at least eight years.

Charlotte, who has spent much of her life in a tank at the Aquarium and Shark Lab in Hendersonville in the Appalachian Mountains, is expected to give birth to up to four pups in the next two weeks.