While surveying the ocean floor, a submarine crew discovered a graveyard of shelled skeletons resembling the monster Gamera. Shinya Kurata later proposed that these were deceased "beta versions" of Gamera; failed prototypes created by the Atlanteans which had once been imbued with Mana, but were discarded upon Gamera himself being successfully created.
Trivia[]
The skeletal Gameras were designed by Mahiro Maeda, who aimed for them to appear slightly mechanical. They were portrayed primarily using shells from Gamera model kits by M1 and Kaiyodo, though a miniature skull made from styrofoam and a hard skull model roughly in scale with the Gamera suit were also used for closer shots.