Seahorse

The seahorse is a character found in Majora's Mask.

Biography
To free the Seahorse from the Fisherman at Great Bay, a good picture of one of the Gerudo Pirates is required, which can be easily obtained by equipping the Stone Mask and photographing any one of the Pirates in the compound.

After Link gives the photo to the fisherman, he will receive the Seahorse in exchange, who wishes to be taken to the waters near Pinnacle Rock. Once in the waters of Pinnacle Rock, the seahorse guides Link through the misty waters to the inner part of the area. Here, the seahorse explains to Link that his friend is trapped among the sea snakes, and asks for the young hero's help. Once Link has killed each and every one of the sea serpents, the other seahorse will be released. Both will thank Link for his help, and will reward him with a Piece of Heart.

The seahorse is described by the fisherman as a rare specimen.