This is what's left of a 1970's era diver! They found him deep in a cave in the Bahamas! This was on the PBS show- NOVA! Here is a link in case you want to watch it! I wanna dive that cave!
http://video.pbs.org/video/1405567128/
No, they said on the show that they found no record of anyone missing, or who went in there! It's been there for more than 30 years! there was no cave dive equipment on the remains! Just another diver than got in over his head, and never found his way out! Too bad you cuoldn't see the show!