The theory was developed as a result of the number of unexplained marine and aircraft losses in the Bermuda Triangle. The idea was that in this region there was a tendency for large areas of vegetation to collect and eventually sink to the ocean floor where bacteria would feed on it thereby releasing all sorts of gasses such as Hydrogen Sulphide and Methane. So I just assumed that it could be the same there but never knew that there were those sea vents in that area supporting life forms that could also produce these gasses as a result of their feeding, this would add to whatever methane could be produced by the vents. The idea that all this gas is held in place below the ocean only due to a critical temperature and should that change then the gasses would surface.
Worldwide distribution of confirmed or inferred offshore gas hydrate-bearing sediments, 1996.
Source: USGSAn explanation for some of the disappearances has focused on the presence of large fields of methane hydrates (a form of natural gas) on the continental shelves. Laboratory experiments carried out in Australia have proven that bubbles can, indeed, sink a scale model ship by decreasing the density of the water; any wreckage consequently rising to the surface would be rapidly dispersed by the Gulf Stream. It has been hypothesized that periodic methane eruptions (sometimes called "mud volcanoes") may produce regions of frothy water that are no longer capable of providing adequate buoyancy for ships. If this were the case, such an area forming around a ship could cause it to sink very rapidly and without warning.
Publications by the USGS describe large stores of undersea hydrates worldwide, including the Blake Ridge area, off the southeastern United States coast. However, according to another of their papers, no large releases of gas hydrates are believed to have occurred in the Bermuda Triangle for the past 15,000 years.