"We completely freaked out when we realized the orcas were hitting the boat."

Pods of killer whales are once again attacking boats along the coast of Spain, striking fear into the hearts of local sailors.

As Live Science reports , the orcas have been singling out sailboats and tearing off their rudders, again drawing attention to the large sea mammals' changing behavior, with experts suggesting that orcas are teaching each other how to take down sailing vessels.

While scientists are still trying to figure out why exactly the orcas have it out for boats at sea, some have suggested that it's simply a sign that they're having fun.

"They don't care if it's a sailboat or motorboat," Spanish conservation group CIRCE president Renaud de Stephanis told the CBC last year. "They look for the rud

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