Giant Aquatic Amoeba: Morpha is the Boss of the Water Temple in Ocarina of Time. Created by Ganondorf once he acquired the Triforce of Power, it has complete control over the water in the room in which it resides, moving swiftly through it and creating long amoeba-like "limbs". This monster is responsible for the receded state of Lake Hylia as well as the frozen condition of Zora's Domain.

Morpha itself is not the transparent muscle-like tentacle as its Ocarina of Time official artwork suggests, but the vulnerable red nucleus often safeguarded under the muck of the thick liquid. This nucleus can manipulate the water in any way it likes, creating one (and eventually two) large water tentacles as the battle goes on.