Zora's Domain

Zora's Domain is a location in The Legend of Zelda: Breath of the Wild. It is located in the Lanayru region of Hyrule, and home to the Divine Beast Vah Ruta, as well as the Zora race. It is a water-based region, with a royal family consisting of this area's Champion - Mipha, who is now deceased. Link can enter this area and defeat Waterblight Ganon to earn the Lightscale Trident, Zora Armor, and Mipha's Grace.

History
Zora's Domain is the home to the Zora race and royal family. Prior to the events of the game, Link was a friend to Mipha, the princess of the Zora's, and frequently visited. At one point, Link saves the village from a Lynel that was bothering them.

Divine Beast and the Great Calamity
Mipha, the daughter of King Dorephan, was chosen to pilot the Divine Beast Vah Ruta, but perished during the Great Calamity. Link later freed her spirit, and she fired a laser to weaken Calamity Ganon. He then receives the Lightscale Trident from the royal family as a show of gratitude.