Answer : False.
Explanation : Methane hydrates formed within the ocean are very expensive to obtain. Therefore, the given statement is false, as they are stable and found in ocean floor sediments with the water depths of greater than 300 meters, where it is exists.
Methane hydrate appears to be a cage-like lattice of ice inside of which there are trapped molecules of methane, they are the chief constituent of natural gas. If methane hydrate molecules are either warmed or depressurized, it will convert back to water and natural gas.