For the past four years, orcas in European waters have been ramming and sinking luxury yachts, leaving scientists puzzled about their motives. Contrary to popular belief, it’s not about territory or aggression, but rather, it’s all about fun for the young orcas. Due to their ample free time and playful nature, these orcas have developed a trend of boat-bumping which has escalated over time. Climate change and a rise in bluefin tuna populations have also contributed to their shift in behavior. Despite the alarming interactions with boats, experts emphasize that the orcas are not being aggressive, but simply engaging in playful behavior.
https://newatlas.com/biology/orcas-killer-whales-boats/