Morpha

Morpha, the Giant Aquatic Amoeba is the Boss of the Water Temple in Ocarina of Time, and has complete control over the water in the room in which it resides. It creates long water tentacles to try to grab Link, shake him and throw him across the room, all the while Link is losing hearts. For Link to defeat this fiend, he must take out his Longshot, pull the amoeba towards him, and slash it. After defeating it, Link will recieve a Heart Container and the Water Medallion.