Orcas' Aggressive Behavior Towards Ships and Sailors on the Rise.

A sailor who has been attacked twice by the same pod of orcas says the killer whales are refining their strategy. The orcas have been causing significant damage to boats along the Strait of Gibraltar, and researchers have several theories as to why they are targeting ships. Some believe the orcas might be using boats to teach their young how to hunt, while others think a single, revenge-bent female has taught the others to attack ships after being injured by one in the past. Many sailors are arming themselves with guns and other weapons to defend their ships, but experts urge against causing any harm to these animals.