Great Bay Coast
Great Bay Coast is one of the main locations within the Great Bay region in Majora's Mask. It's mainly composed of the beach surrounding the coast and the waters in the bay that lead off into other locations within the region. The bay area remains largely deserted due to the murky waters and hot weather conditions, which is said to be the cause of the evil within the Great Bay Temple.
Story
Link is first allowed to enter this region once he has rescued his trust steed, Epona from Romani Ranch, once done so he can jump the barrier to the west of Termina Field and enter the region. The young hero is struck by the largely deserted beach and bay. In the shallow waters of the bay Link stumbles upon an injured Zora, Mikau, who happens to be an important member of the Indigo-Go's music band. The young guitarist tells Link about the problems of the bay and asks Link to heal his sorrows. Link then plays the Song of Healing, allowing the young Zora to pass away peacefully, in which his soul becomes embodied within the Zora Mask. This mask gives Link th ability to traverse through the waters of the bay and allows him to earn the trust of the Indigo-Go's.
Link must travel out into the shallow waters of the bay and to the Marine Research Lab, where he is informed by the Professor that he must find an return six Zora Eggs that have been stolen prior to his arrival. Swimming to the east side of the bay, Link uncovers a secret entrance leading to the inner chambers of the Pirates' Fortress. Link is able to recover four eggs from this area and return them to the lab. The other two are located in the treacherous waters within Pinnacle Rock. However, Link must first obtain the Seahorse in order to navigate the murky waters. To do so he must take a picture of a Gerudo Pirate and show it to the Fisherman inside his Hut. With the six eggs hatching, the baby Zoras form to make a series of musical notes and Link learns the New Wave Bossa Nova, which he can use to gain entry to the Great Bay Temple.