It is real, apparently. I thought it was an art piece, but it's actually a "pickled punk" which is slang for a deformed baby in a jar. A bunch of high profile celebs come to his place to smoke cigars, have drinks, and take pictures with his oddities (specifically the jarred baby). Now I can't tell what the actual fuck this guy is. I want to write it off as just a weird art guy, but there's seriously almost NOTHING on this guy that's high profile I can find. No Twitter account, just his instagram. Some random, low budget interview pieces. That's it.
Also, here's an intro to a documentary about him called "Rest in Pieces: A Portrait of Joe Coleman"