The recent spate of unusually hot water has brought some unexpected guests to the North Sea. A Dutch fisherman spotted a group of about ten dolphins in waters between the Netherlands and the coast of England and filmed the group.

The animals have been feeding in the area for weeks near a big sandbank where there is plenty of food.

According to Jessica Meerbeek of SOS Dolfijn the animals are definitely dolphins, ‘What we don’t know is the exact species. We think they may be bottlenose dolphins or perhaps white-beaked dolphins. They are definitely not porpoise,’ she told broadcaster NOS.

Experts say the hot weather has made food in the North Sea more plentiful and that has attracted the dolphins.