An aggressive humpback whale appeared to turn the tables on a pod of orcas off the Canadian coast, stalking then ambushing the group that more usually would have been attacking it.
The rare occurrence took place on the Salish Sea between British Columbia and Washington state and was witnessed and recorded by enthralled tourists on a whale-watching trip.
Orca, also known as killer whales, are the largest species of dolphin and usually feed on seals and sea lions individually but will team up to attack other whales.
While video footage of such an encounter is rare, humpbacks have been known to go on the offensive. The Sun reported that in 2016 researchers from Oregon State University found 30 cases in which humpbacks attacked orcas when they were pursuing whales and other mammals.
Mark Malleson, captain of the Prince of Whales whale-watching boat, said Valiant was known locally for its aggression, perhaps because of earlier encounters with orcas.
