|Episode:||Marine blue of the seashore|
|Season:||Uchuu Keiji Shaider|
|Voice Actor:||Eisuke Yoda|
Gamegame (ガメガメ Gamegame?): A tusked turtle Fushigi Beast armed with a trident who breaths fire and smoke, created to go after the last three survivors of Planet Marine their golden turtle until Shaider drove it off. When Gamegame goes after the Marinians, Shaider chased it into the Fushigi Dimension, fighting it and its phantom-masked warriors until Shaider runs the monster through with its own weapon before destroying it with Shaider Blue Flash while the Marinians leave for Earth's seas. Its powers include swimming, high jumping, a trident with a machine gun in each spear, teleportation, summoning a cage, size changing, flammable mouth mist and summoning four harpooners with grenades.