Chester the false killer whale likely died of a bacterial infection, according to the Vancouver Aquarium. As a precaution, the aquarium's last living cetacean, a Pacific white-sided dolphin named Helen, is being treated with antibiotics. Chester, left, shared a tank with Helen, a Pacific white sided dolphin. False killer whales are a species of dolphin, often confused with killer whales. They are considered to be a tropical or sub-tropical species with the most studied populations living around the Hawaiian Islands.

Source: CBC News December 02, 2017 03:45 UTC