The Mysterious Phenomenon of Killer Whales Attacking Boats.

Killer whales near Spain and Portugal are colliding with and sinking boats, and researchers believe they may be imitating the behavior of a single female orca named White Gladis. The behavior may have been triggered after White Gladis was hit by a boat, or it may be playful. Orcas are highly intelligent and social creatures, and the behavior is spreading among the population. While the behavior is unlikely to spread to other orca populations, continued clashes with boats could result in serious injury or death to a person or a whale.