The orange-stained, massive gas hydrate, which is covered with sediment and probably interspersed with carbonate rock, likely forms the structure of the hydrate mound.  Porous gas hydrate formed around gas bubbles as they are emitted from the seafloor beneath the overhang is visible in the center of the photo, just left of the fish.

The orange-stained, massive gas hydrate, which is covered with sediment and probably interspersed with carbonate rock, likely forms the structure of the hydrate mound. Porous gas hydrate formed around gas bubbles as they are emitted from the seafloor beneath the overhang is visible in the center of the photo, just left of the fish. Image courtesy of the NOAA Office of Ocean Exploration and Research, Gulf of Mexico 2017.

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