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Deep Discoverer
Remotely operated vehicle Deep Discoverer makes its way across a sediment plain at the beginning of Seascape Alaska 3 Dive 05 at a depth of approximately 2,800 meters (1.74 miles). The seafloor during this part of the dive contained a large number of biogenic burrows and mounds, indicating active life within the sediment.
Credit

Image courtesy of NOAA Ocean Exploration, Seascape Alaska.