When we see bubble plumes like this we know there will be methane leaking from the seafloor; however, we never know what that is going to look like and on this particular site we were met with an amazingly expansive microbial mat.
Bubble Plumes
Image courtesy of Oregon State University, NOAA OER, NOAA OCNMS, Ocean Exploration Trust, NA-121. Download larger version (jpg, 445 KB).

When we see bubble plumes like this we know there will be methane leaking from the seafloor; however, we never know what that is going to look like and on this particular site we were met with an amazingly expansive microbial mat.

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