Several pilot whales have stranded on an island in north-west Scotland, according to a charity. The British Divers Marine Life Rescue (BDMLR) organization said it was alerted on Sunday morning. “Previous reports indicate that there are around 55 animals, but the latest update from the field indicates that only 10 are alive,” the organization said.

The pilot whales stranded on the Isle of Lewis, which is part of the Outer Hebrides. Pilot whales are also known as pilot whales and belong to the dolphin family. Adults can weigh up to a ton and reach six meters in length.

The BDMLR organization wrote that it is not currently known why the animals were stranded. However, pilot whales are known for their strong social bonds. “So if a pilot whale gets into trouble and strands, the others follow, causing more of them to strand.” The organization called for avoiding the area so as not to disturb the work of the helpers.