CGI rendering of a USO emerging from the ocean.
A USO (unidentified submerged object) is any apparent anomaly underneath the sea that cannot be identified as a known phenomenon. The term "USO" was born when alleged sightings of extraterrestrial spacecraft underneath the sea began to surface.
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In general: UFO · USO | |
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Media: Derelict · Tripod · Alien Attacker · City Destroyer · Independence Day Mothership · Furon Mothership | |