During the Second World War, the Marshall Islands, due to their geographical location in the Pacific, were the scene of numerous armed conflicts between the USA and Japan. Even today the traces of it are visible. On and around the various atolls you can find the remains of bunkers and control centers, sunken shipwrecks and crashed planes. The upper photo shows the ruins of Japanese tankers on the island of Tarawa in Maloelap Atoll.
In the video you see an American aircraft wreck (probably a small bomber) lying on the bottom of the Majuro lagoon. It has become an artificial reef for a variety of living beings. Irony of time.