Vast amounts of methane are stored as marine methane under the oceans. It seems that fire-ice (frozen methane trapped as a solid under our oceans, buried in the ocean floor) is vulnerable to melting due to climate change and could be released into the sea. As frozen methane and ice melts, methane is released and moves from the deepest parts of the continental slope to the edge of the underwater shelf. This means much more methane could potentially be vulnerable and released into the atmosphere with continued warming.
www.ncl.ac.uk/press/articles/latest/2023/12/fireice/