Ghost of Misery Mire

The Ghost of Misery Mire is an invisible enemy in Misery Mire of A Link to the Past. There are three of them throughout the swamp. It is evidently the result of a glitch in the game.

Facts

 * The Golden Bee is unable to detect the Ghost.
 * Hitting a Ghost with the Pegasus Boots makes the sound of the Hookshot.
 * Unlike most enemies, the Ice Rod will instantly kill a Ghost.
 * According to the game's code, the Ghost is most likely a Cyclops Fish or River Zora. Although some claim that this identification itself is a glitch and that the Ghost is actually a Geldman.

- a detailed description of the beast on GameFAQs.