Dive Buddy

Doctor and diver Ben Burville https://twitter.com/Sealdiver made friends with a young female grey seal that became used to seeing him dive in her waters. He calls her "Dive Buddy," and she loves to hug, nuzzle, and hold "hands" with Burville. She also loves getting a nice scratch from him. Dive Buddy will even chase other seals away from him! Burville says,

I would advise that divers do not touch marine life. Notably grey seals have a range of rather unpleasant bacteria in their mouths and these bacteria* can cause serious infections. (*Including various mycoplasma and streptococcus species)

You can see other videos of Burville and Dive Buddy at Laughing Squid.