Kavna - the Beluga whale at the Vancouver Aquarium - passed away from cancer.
The VA is planning on restoring the Beluga whale population in its facility due to two high profile deaths recently, especially after the completion of the new Arctic habitat in 2016.
They claim to be replenishing their stock with other captive bred beluga from other facilities.
http://www.torontosun.com/2012/08/07/beluga-death-leaves-hole-in-pod
“Poor Kavna, the oldest beluga whale surviving at the Vancouver Aquarium, died today on a holiday Monday (August 6, 2012). Kavna was brutally captured pregnant in 1976 in Hudson Bay, Canada. She gave birth to Tuaq in July 1077 but he died only 4 months later. Poor Kavna has seen her baby die in that tank, as well as 8 other whale inmates. The only 2 belugas left at the Vancouver Aquarium now are Aurora and Qila. The Aquarium closed the orca whale tank in 2001. It’s time to close the beluga tank, too!!!” - No whales in captivity, Facebook.