The attacks have become a big problem in southwestern Europe - but animal behaviouralists have no idea why they are on the rise or what is causing the creatures to act this way.
Is THIS how to stop killer whales ramming boats? Sailors say they re blasting heavy metal music out underwater to deter orcas businesstelegraph.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from businesstelegraph.co.uk Daily Mail and Mail on Sunday newspapers.