Morpheel

is the third boss found in Twilight Princess, and is located in the Lakebed Temple. At first, it is an anemone- or Charybdis-like creature with a single eye that constantly moves through the tentacles and must be extracted via Clawshot. After some time it will shoot out Bombfish which you have to throw at it and take them with your Clawshot to defuse them. Morpheel erupts out of the ground, revealing that it is an enormous, eel-like creature, and that the tentacles were only its feelers.

The manner of which Morpheel is fought in its first form is identical to that of Morpha from Ocarina of Time. Morpheel's tentacles resemble Morpha's ability to extend a tentacle-like water funnel from its watery body. Morpheel can also move its single eye through its many tentacles, in the same way Morpha can move its nucleus throughout the funnel of water, and both have to be removed with their represented game's hook device. Morpheel's American name is a combination of "morph" and "eel", and shares the same prefix, "morph", with Morpha. Its Japanese name is simply a reference to the fact that it has eight feelers.

Strategy
Morpheel's first form is simple to defeat. Equip the Iron Boots, avoid the Bombfish it releases, then grab its eye with the Clawshot. Attack it immediately. Repeat. After two times, its tentacles will retract. Morpheel's eye will get swallowed, ending up on his back. Swim above it and use the Clawshot to latch onto the eye (the Critical Point). Slash away again, and Link will be thrown off. Do this a few more times, and it will go down. Then Morpheel will crash into the wall, draining all the water in the room.

Upon defeating Morpheel, Link will receive the third and final Fused Shadow and another Heart Container.

Trivia

 * Morpheel is possibly the largest boss Link has ever fought, along with Molgera, Dark Dragon, Bongo Bongo, Twinmold, Stallord, Cragma, and Eox.
 * The strategy for defeating Morpheel incorporates the strategies for defeating both Morpha and Molgera.