Ocean Floor

The Ocean Floor is a location from Spirit Tracks. The underwater portion of the Ocean Realm, the Ocean Floor is where the Ocean Temple is located. To reach the Ocean Floor, Link must travel via Spirit Train through a magical portal shaped like a fish. Once he does this, he is transported beneath the ocean, where he and his train are somehow proteced from the underwater conditions, presumably through the divine-like powers of the Spirit Tracks.

The Ocean Temple's exterior itself is guarded by a Dark Train and Armored Train. Because the Spirit Train's cannon can not function properly underwater, it shoots torpedoes instead to ward off these hostiles. If Link can successfully overcome these dangers, he gains access the Ocean Temple where he is one step closer to restoring the Tower of Spirits.