The bow of a shipwreck covered with various marine organisms, including anemones and sponges, on the deep ocean floor, viewed from a remotely operated vehicle.
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Bow of Amakasu Maru No.1
The bow of Amakasu Maru No.1, one of the shipwrecks associated with the Battle of Wake Island, as seen during the Deepwater Wonders of Wake expedition on NOAA Ship Okeanos Explorer in 2016.
Credit

NOAA Ocean Exploration, Deepwater Wonders of Wake