Zora Mask

The Zora's Mask is an item that appears in both Ocarina of Time and Majora's Mask.

Ocarina of Time
In Ocarina of Time, the mask is available for trade in The Happy Mask Shop. It serves no purpose other than to provoke different reactions from people Link talks to while wearing it. When shown to Princess Ruto, she will compliment on how Link has become a Zora.

Majora's Mask
In Majora's Mask the mask allows Link to take on the body of the Zora guitarist, Mikau, becoming Zora Link.

Obtaining the Mask
Upon entering the Great Bay, Link notices a Zora floating in the water, almost dead. Once Link helps this Zora to the shore, the Zora explains that he is Mikau, guitarist for the famous Zora band the Indigo-Go's. He was trying to help another band member but was fatally injured in the process. By playing the Song of Healing, Link can rest Mikau's soul, leaving behind the Zora Mask.