Morpha

"Link! Look out! That isn't normal water over there!"

- Ruto

Giant Aquatic Amoeba: Morpha is the sixth boss of The Legend of Zelda: Ocarina of Time, appearing in the Water Temple. Morpha is a ball-sized cell nucleus with absolute control over any body of water it inhabits, and is responsible for the curse that froze Zora's Domain and drained Lake Hylia. It is a quick swimmer and can due high jumps on land. It is fought in a room with a pool of cloudy water with four large platforms in it, while the room's walls are lined with spikes. When Link enters the room, Ruto warns him the water is not normal. When he first goes onto one of the platforms, the camera switches to Morpha's point of view as it swims around before summoning a tentacle to climb inside and investigate Link. Link notices it and the battle starts.

Morpha spends most of its time in the water, though it occasionally skips over the tops of the platforms. Morpha's sole attack is to swirl around to form appendages to attempt to grab Link with. At the beginning of the battle, it only summons one at a time, but as it progresses, it begins to summon more. Sometimes, the tentacles are across the room from Morpha, so the player needs to pay attention to audio cues as well when focusing on it. If a tentacle grabs Link, it will swing him around repeatedly, causing damage, before eventually throwing him across the room. The only way to damage Morpha is to attack the nucleus directly, but it is immune to most weapons, including Deku Nuts, arrows, and bombs. As such, he needs to bring it in close by grabbing it with the Longshot, taking care not to let it drop back into the water. Due to its erratic movements, it can be difficult to grab unless it is inside a tentacle. Once it is close to Link, he can attack it directly with a sword or the Megaton Hammer, though touching Morpha with his body will damage Link. Due to Morpha's light weight, damaging attacks will usually knock it far away, often pushing it back into the water and starting the process over. Once enough damage has been dealt, Morpha raises into the air and pops, causing the water in the pool to raise into the ceiling as a tendril, draining it out, with a final drop spawning a Heart Container. Following this, the water returns to Lake Hylia, though Zora's Domain remains frozen.