>> Aren't methane hydrates responsible for the "Bermuda Triangle" phenomena?
They may be, there are vast deposits in the Gulf of Mexico and off of Florida... http://marine.usgs.gov/fact-sheets/gas-hydrates/title.html
I saw a real piece at a rock and mineral show. It is a stone that changes to methane gas. They had some stored in dry ice, it was cool.
Some day we will begin to mine the stuff.
There's a deposit off a part of North Carolina's coast which would supply US natural gas needs for more than a year. The total gas hydrate deposits on the ocean floors would run the entire civilization for thousands of years.