Vancouver aquarium's dolphin gives birth to stillborn calf

It's a sad day at the Vancouver Aquarium.

Hana the dolphin was in labour for more than 10 hours and gave birth to a stillborn calf.

She is an 11-year-old Pacific white-sided dolphin who came from Japan last year after being caught in a fishing net. When she came to the Vancouver aquarium she was already pregnant, but staff did not know about her pregnancy until a few months after she arrived.

Veteranarian David Huff says very few dolphins give birth in captivity so there is a lack of research in the area.

The Vancouver Aquarium says the fortunate thing about the birth is that Hana is alive and well; if she had to have the calf on her own in the wild she would have probably died.