Crystalbug (red)

The Crystalbug is a fiend/crystalbug-type enemy from Final Fantasy XII. One can be found in the Walk of Revelation area of the Stilshrine of Miriam. Crystalbugs can be blue like regular save crystals, orange like teleport crystals, or green, which is not a color given to legitimate save crystals. They will not attack until inspected by the player. Crystalbugs do not give any experience points, but they do give 10 license points and become actual save crystals when defeated, so they are worth fighting.

Page 1: Observations
"Being a fiend that, unable to move and hunt for food on its own, mimics the form of a crystal, thereby tempting its prey to come to it. The deception is nearly perfect and thus almost impossible to detect. Should an ill-starred traveler mistake such a creature for a crystal, and reach out his hand, he will be treated to a maelstrom of the strongest magicks, before having his life juices summarily drained."