Kyamerons are recurring enemies in the Legend of Zelda series. They are bubble-like enemies that form in shallow water and, once complete, bounce around the room until they either dissipate or run into Link, causing damage.
Kyamerons are found in the Swamp Palace. Kyamerons cannot be easily defeated; to defeat one, Link must freeze one with the Ice Rod first, then hit it with the Magic Hammer to smash it while it is frozen.
Kyamerons are once again found in the Swamp Palace. Since Link will not necessarily have the Ice Rod while traversing the Swamp Palace in this game, it is not required to defeat them.