The Phi Phi Islands off western Thailand are known for their abundance of sea turtles, but chances are that very few people have watched two of these playful critters greet each other with their version of a high five. Jan Lempfrid captured the peculiar but amusing event during a recent expedition to the region, specifically at a dive site called Malong. Watch as the turtles approach one another, and then slap flippers in what appears to be an acknowledgment of each other’s presence. Had there been a chest bump, we could be sure that this was no accident.