Apparently there's a shoal of Orca Whales have taken to attacking small boats off the Straits of Gibraltar. Theres been more than 20 attacks recently. This is a recent account, a boat was attacked for more than six hours by a large shoal, battering the boat till the hull was letting in water, and destroying the rudder.
Video: Terrifying moment killer whales attack British sailor's yacht | Daily Mail Online
This is weird stuff, is this a change in Orca behaviour, or is this just a pack of rogue animals.