Normally we find seeps by sending soundwaves through the water column and watching them bounce off bubbles. Here one can see the plume of bubbles from the seafloor that we used to identify a site for our last seep discovery dive.
Multibeam Bubbles
Image courtesy of Ocean Exploration Trust - NA121. Download larger version (jpg, 883 KB).

Normally we find seeps by sending soundwaves through the water column and watching them bounce off bubbles. Here one can see the plume of bubbles from the seafloor that we used to identify a site for our last seep discovery dive.

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