Gigas Worm, also known as CREEP in the Nintendo Entertainment System version, is an enemy in the original Final Fantasy. It is weak to Fire, so casting Fire is the easy way to defeat this enemy. Gigas Worms appear early in the game, and they should not pose a threat if the player has spent some time leveling their party up. They appear in the Chaos Shrine, in the present, and outside towns such as Pravoka and Elfheim.
Gigas is a popular term for races of giants in fantasy games. Gigas is a Greek word meaning "giant," originally used to describe the race of Gigantes in Greek mythology and is used in the scientific name, as the specific epithet, of hundreds of species of animals and dozens of plant species to denote their size.