Scientists from the Vancouver Aquarium have released video of dolphins hanging around pods of killer whales, two species that are usually more like predator and prey than Felix and Oscar.
"Resident killer whales swim around vocalizing a lot, loudly and conspicuously," said Barrett-Lennard.
"Sometimes a small group of dolphins will get in front of a group of (resident) killer whales and it will almost look like you're out walking your terrier and the dog's out ahead."
By the early '90s, scientists were starting to see dolphins near pods of resident whales.
"Sometimes, if a large group -- 100 or more dolphins -- approaches a small group of killer whales, often the whales will dive and stay down for longer than usual and then come up some distance away.