Killer whales have been spotted in Vancouver's harbour twice in the last two weeks and are expected to return. If killer whales enter the harbour, they tend to go as far as the Vancouver Convention Centre then turn around and head back out, he added. Seals are popular prey for Bigg's killer whales and there are plenty of them in the harbour. Transient killer whales feed on marine mammals, unlike resident killer whales, which feed mostly on Chinook salmon. "I think that the whales returning to Vancouver harbour is a sign that the environment is improving in the inner harbour a bit for them," Barrett-Lennard said.

Source: CBC News April 25, 2019 21:11 UTC