They're back. A pod of orcas in southwestern Europe sank a sailing boat on Oct. 31 after a non-stop, 45-minute attack, Live Science reported. The incident is the fourth occurrence in two years where orcas, also known as killer whales, are blamed for sinking ships in southwestern Europe. Orca pods from the Strait of Gibraltar region have been harassing boats and their passengers for more than three years. Head to the link in our bio to learn why this keeps happening.