Two whales, one transient orca and one humpback, were found dead in Vancouver Island waters over the last few days, and now teams from Fisheries and Oceans Canada are trying to figure out how they died.
The orca, a mature male, was reported by an angler in Grapplers Inlet Sound near Bamfield on Thursday.
Fisheries and coast guard crews were able to perform a necropsy on Saturday.
DFO Marine Mammal Coordinator Paul Cottrell said there was no visible trauma or obvious cause of death, and tissue samples have been sent for toxicology.
The humpback was spotted late last week as well in Quatsino Sound.
Crews were still attempting to secure it Monday so they can perform a necropsy.