Reekfish

The Reekfish is a red fish that can only be found in Zora's Domain in Twilight Princess, and is a favorite food of the Yeti race. The fish has a strong smell which helps Link, while in wolf form, locate the source of all the monster sightings in Zora's Domain. Strangely, when you first meet Yeto, he is holding a Reekfish as big as Link, which is several times bigger then any seen in Zora's Domain.

The Reekfish can only be caught with a special Coral lure.

It apparently has a horrid stench, according to its description.

Trivia

 * Apparently if Yeto had not had the large Reekfish when he met Wolf Link, he would have eaten Link for dinner instead.