Orca (Killer Whale) Orcinus orca 

There is a small group of orca who live in British waters. Orca's are the largest member of the dolphin family. Their black-and-white patterning works as a camouflage, from above and below. It breaks up their appearance and makes them harder to see in the water. Image: James Maughn (iNaturalist).

Find out more: Whale and Dolphin Conservation, The Mammal Society, Suffolk Wildlife Trust, iNaturalist