The Carbuncle is an enemy from Final Fantasy III, fought in Altar Cave. It is only slightly stronger than the Goblin, but as one of the first enemies encountered in the game, it is still fairly easy to beat.
Carbuncle was a mythical creature reportedly sighted in the Americas by Spanish conquistadors. It is described as a small creature, either a bird or a mammal, that has a gem in its forehead crystallized from the brain of a dead dragon. According to myth, it is good luck to catch a carbuncle. A carbuncle is also an archaic name given to any red cabochon cut gemstone. The name applied particularly to red garnet.