Blue Planet II depicts a group of Dolphins visiting a certain kind of coral that emits a substance that allegedly helps them fight off parasites. Earlier BBC d

Blue Planet II depicts a group of Dolphins visiting a certain kind of coral that emits a substance that allegedly helps them fight off parasites. Earlier BBC documentaries show animals (birds and fish) seek the "service" of certain types of fish to clean them from parasites. So the idea of animals using medicine is kind of presenting itself. It's not totally in your face, but it's no more out there than prehistoric humans discovering the medicinal properties of certain plants.