Cryptid Lore

Now I’m almost certain this is just a creepypasta but the very few mentions I’ve seen about it claim it’s a cryptid. The earliest mention of it I can find is on Reddit from a suspended user complexityspeculator. The important part from the post is as follows Has anyone heard of the 'phantom' or 'black' diver? Apparently certain divers have interacted with another diver underwater that has an odd way of moving, no face and a squishy carapace and often vanishes In an inky black cloud or floats lethargically. This particular cryptid has also been spotted in the form of a dolphin, which given the appearance sounds like a larger version of a mimic octopus. I first heard of this from the channel NFuel. Does anyone have more info about this? Possibly the origin? Or maybe evidence of it thanks for the help!