Peter Barrington Best FRSSAf (1939 - 22 April 2015) was an English marine biologist known for his research on whales and dolphins of Southern Africa. He was described as the world's foremost authority on the whales and dolphins of the Southern African region. Best was an Extraordinary Professor and Head of the Whale Unit at the Mammal Research Institute of the University of Pretoria. He was well known for his work on whales and dolphins but also studied seals.