Killer whales attacking boats off Spain raise concerns.

A video captured a killer whale biting the rudders off a boat in the Strait of Gibraltar, following a similar incident in May where a group of orcas severely damaged a sailboat off the coast of southern Spain. Scientists suspect young whales might be imitating the behavior of a traumatized orca called White Gladis, who suffered a "critical moment of agony," likely a collision with a boat or entanglement with a fishing line, that turned her more aggressive. The Atlantic Orca Working Group reported 18 such interactions in the region in May.