Lake Floria

Lake Floria is a location in Skyward Sword. It is located southeast of the Faron Woods and is inhabited by the squid-like Parella tribe.

Features
Lake Floria is the largest known body of water that exists in the present day on the Surface. It it inhabited by a large range of flora and aquatic creatures and enemies. Most of the lake is composed of large submerged underground caverns which can be explored through the use of the Water Dragon's Scale and the bomb-like Froaks.

Link first discovers the entrance to Lake Floria after completing Farore's Silent Realm. He obtains the Water Dragon's Scale, allowing him to swim underwater, and makes his way up to the top of the canopy of The Great Tree, where he meets the Kikwi Hermit known as Yerbal. He reveals the location of the entrance to Lake Floria.

The lake is inhabited by the squid-like Parella tribe, who are protected by the sacred Water Dragon Faron. She was entrusted with a part of the Song of the Hero and protects Farore's Flame. Shortly before Link arrived, however, Lake Floria was invaded by Ghirahim and his force of aggresive beasts known as Cranioc, and Faron was injured as a result.

Nearby the lake is the Ancient Cistern, a water/dark themed dungeon where Link can obtain the Whip and Farore's Flame.

Theory
Many Zelda fans believe that this is an earlier incarnation of Lake Hylia, similar to how both Eldin Volcano could be Death Mountain and Lanayru Desert could be Gerudo Desert.