Morpheel

Twilit Aquatic: Morpheel is the third boss found in Twilight Princess. Located in Lakebed Temple, Morpheel is only superficially similar to Morpha, from Ocarina of Time.

Strategy
Morpheel's first form is simple. Equip the Iron Boots, avoid the explosive fish he shoots out at you, then grab his eye with the Clawshot. Slash it like crazy. Repeat. After a couple of these, the tentacles will retract. Check out the water around you, and he will emerge, a giant hungry Eel. His eye will get swallowed, to end up on his back. Swim above him, and use the clawshot to grab his back, latching onto the eye {the Critical Point). Slash away again. You will be thrown off. Just do this a couple more times, and he will go down.

By defeating Morpheel, Link will recieve the third and final Fused Shadow and another heart container.