The Adamant Turtle is an enemy from Final Fantasy Mystic Quest. It attacks with fire, and is weak to axe-type attacks. As Reuben's weapon is an axe, Adamant Turtle can easily be slain by him along with the player's own axe. Adamant Turtle has two phases. The first phase has it rear its head back in a menacing manner. The second phase has it tucked into its shell.
Adamantite and similar words including Adamant and Adamantine are used to refer to any especially hard substance, whether composed of diamond, some other gemstone, or some type of metal.
In the German release, the enemy is known as "Maden Fresser" which means "grub eater".