Aurora had been ill for a week, showing symptoms of stomach pains and little appetite. Qila, who was 21 years old, died after experiencing many of the same symptoms.
But some people aren't so surprised by the sad passing of Aurora and her daughter.
"As we have noted for years now, belugas do not fare well in captivity," Naomi Rose, marine mammal scientist for the Animal Welfare Institute (AWI), told The Dodo. "These Vancouver deaths are not unusual, unfortunately - belugas do not breed well and often die young in captivity. Both Aurora and Qila were less than 30 years of age, which is middle-aged for free-ranging belugas."