A sailing crew captured the terrifying moment a pod of three or four killer whales attacked their boat, tearing away half its rudder and forcing the crew to check for leaks.

Footage shows the killer whales swimming beneath the 42ft yacht Seika before repeatedly striking the vessel near Picamillo, in Galicia.

A sailing crew captured the terrifying moment a pod of three or four killer whales attacked their boat, tearing away half its rudder and forcing the crew to check for leaks.