The Netherlands is experiencing a remarkable wave of marine animal strandings, with ten different species of sea mammals spotted or washed ashore in just four months, according to Jeroen Hoekendijk of SOS Dolfijn, a Dutch foundation dedicated to cetacean welfare. Among the animals are a sperm whale near the coastal village of Renesse, a beluga whale off Callantsoog, and a Risso's dolphin at Kamperland — species that have not been seen along Dutch shores for decades, in some cases since 1970. Experts say the causes vary by animal and may include entanglement in fishing nets, noise pollution from sonar used to track submarines in the North Sea, and disorientation, though marine biologist Lonneke IJsseldijk cautions that the full picture remains too complex to reduce to a single explanation.