Whale sharks are aptly named because they are the biggest shark species in the ocean. They are the biggest fish, and they are second in size only to a few species of whale, which are all mammals. They are gentle giants that can reach lengths of almost 17m (55 feet) and have been estimated at a weight of up to 45,000kg (100,000lbs). Despite their enormity, they pose no threat to humans and they have no intent or ability to hurt one, unless somebody was foolish enough to swim too close to the gigantic tail. When threatened, they simply outswim their adversary, or dive too deep to be pursued. Their food consists almost exclusively of tiny fish, krill, plankton, and fish eggs. They have no teeth and are incapable of biting a person. Instead, they filter water over large combs, like whales, and then it passes out the gills as the food remains inside the mouth to be swallowed. These scuba divers are studying the whale sharks in the Galapagos Islands. The videographer has followed a large, pregnant female as she casually drifts past on the ocean current. A second female appears to the left, on a collision course with the first. Like a freight train in motion, the whale sharks are much too enormous to stop suddenly. The change in fin position and body position suggests that the first whale shark is slowing as much as possible. The second whale shark passes underneath and arcs up in what appears to be an intentional contact. She then wiggles and seems to enjoy a little back scratch on the underbelly of the first whale shark. This is a very rare sight and the seasoned scuba divers are clearly excited. We can hear underwater shouts and delighted laughter as they exchange shocked looks. The diver with the video camera turns it on himself to record his own wonder and disbelief. He tries to for an "OK" sign with his hand but the fact that he is holding a Covid mask (to be worn in preparation for his return to the dive boat) prevents him from doing so and he tries for "number 1" sign instead. Whale sharks are a wondrous sight to behold, even from a distance, but to be in the presence of one, or even two, when they are almost close enough to touch is a life changing experience.