Catalina Island is a major UFO and USO hotspot, with decades of reports describing lights entering or exiting the ocean, objects hovering offshore, and sudden accelerations witnessed by boaters and pilots. The island’s proximity to deep-sea testing ranges and naval activity has fuelled theories of submerged bases beneath surrounding waters. Catalina remains one of the most frequently cited locations in West Coast underwater-UFO lore, with modern drone footage and eyewitness accounts keeping the phenomenon active.