Killer whales have sunk three boats off the coast of Spain and Portugal so far this year. But experts agree that the behavior is not malicious.

Orcas have been observed ramming boats and even sinking some of them. But this isn't new. Here's a video from 2014 of a pod of orcas chasing a speedboat.

Astonishing footage has emerged of killer whales targeting two tourist boats in Portugal this weekend. A pod of the animals repeatedly rammed and sank a yacht full of tourists off the coast of Fonte ...

Orcas sank yet another yacht as Portuguese Air Force saved the stranded family of five off the coast of Portugal (Picture: Portuguese Air Force) A young family narrowly escaped death after killer ...

The historian Procopius described how a creature called Porphyrios terrified sixth-century sailors for 50 years. But what was ...