Lakebed Temple

Lakebed Temple is the third dungeon within Twilight Princess. It is also known as the Zora Temple. It is located at the bottom of Lake Hylia and is the temple of the Zoras to worship Lanayru.

The temple is based around water and seems to be a spiritual sequel to the Water Temple of Ocarina of Time, but is based on the manipulation of the flow of water, and would hence be more closely linked to the Great Bay Temple from Majora's Mask. The temple consists of four floors and two basements. Using different handles and mechanisms, Link must manipulate the flow of water to move waterwheels and platforms to get deeper into the temple. The item you receive in this temple is the Clawshot, a highly upgraded version of the Hookshot. You get this after defeating the mini boss, a Deku Toad.

The final boss is Morpheel, the spiritual successor to Morpha. The boss is a giant eel-like creature, with a eyeball attached to the back of it's head. When you begin, the eye is floating around each of it's many tentacles. Soon it launches into the water and swims around the boss room.

Some people think Lakebed Temple is the shortest dungeon in Twilight Princess, which would be the opposite to its Ocarina of Time counterpart, the Water Temple.

Theory
It is possible that Lakebed Temple is in fact an extension to the Water Temple in Ocarina of Time. This is due to the fact that they are both in the only remaining area of water before Lake Hylia is replenished, and they both require the Iron Boots and some form of waterproof clothing to access.