Morpheel

Morpheel is the third boss of The Legend of Zelda: Twilight Princess, being a sea creature heavily mutated by the dark influence of the Fused Shadows' fragment contained within the Lakebed Temple. It appears as a giant-sized version of a long, segmented, prehistoric fish (with some traits of a and ), but with chitinous skin, a pair of nested mouths, and a mane of eight hollow, electrified tentacles that allow one of its twilight-marked eyes to float between them. Unlike most of the game's bosses, it is not made clear what it was prior to its transformation, though the Japanese script implies the otherwise-absent Octoroks. Its English name is a reference to Morpha, a boss in The Legend of Zelda: Ocarina of Time whose battle is extremely similar to this boss's first phase, though the second phase is more similar to Gyorg from The Legend of Zelda: Majora's Mask.

The boss arena is an enormous dark, underwater chamber found deep underneath the temple, internally resembling the 's dome, but with a circle of giant pillars. Morpheel at first is buried in the sand in the middle with only one tentacle showing, but when Link descends far enough, the eyeball floating inside it sees him and Morpheel digs its head out. To attack, it attempts to grab Link with its tentacles, then pull him into its mouth to chew on him and then spit him out. To damage it, Link needs to use the Clawshot to grab the eye as it floats up and down inside the tentacles. Once it is pulled out, he can attack with his sword, but it eventually returns and Morpheel spits out a school of Bombfish to attack and distract Link. Once the eye is pulled and attacked three times, Morpheel sinks into the sand before emerging completely, beginning phase two.

In the second phase, it swims around the arena, occasionally knocking over the pillars. If Link gets in front of it, it attempts to vacuum him into its mouth to chew on him again. To damage it now, the Clawshot must be used while swimming above it, targeting its remaining eye on the back of its neck. Once Link has attached to its back, he can strike the eye with his sword (creating clouds of purple blood), though he is eventually dislodged. After this strategy is done three times, the disoriented Morpheel crashes into the wall, cracking it, draining the water out, and brightening the room. The beached Morpheel then explodes from head to tail, releasing the final Fused Shadow.