Maguma's name literally means "magma", which could be a reference to how Maguma is weak to high temperatures.
Maguma looks like a giant brown walrus with yellow eyes, pale tusks, smooth skin, and no visible hair. Maguma also lacks a tail.
Maguma first appeared when it was awakened by missile fire at the North Pole. Maguma attacked the base and it went home to its valley. A VTOL aircraft was sent to kill Maguma, and it buried it under a pile of rocks. Maguma broke out of the rocks and attacked again. The aircraft attacked Maguma with energy beams, killing it.
- Main article: Gallery:Maguma.
- Just like Ebirah, Maguma was originally supposed to appear in Destroy All Monsters and was meant to guard the Kilaak base with Ebirah and Baragon, but due to the suit deterioration he was replaced by Gorosaurus, Minilla and Anguirus.
- It is thought that Tsuburaya Productions, who last used the suit, damaged it beyond repair when Maguma was used as the Ultra Q monster Tadora.