Desbreko

From Zelda Wiki.org

Desbreko
Game(s)	Majora's Mask
Habitat(s)	Great Bay Temple Great Bay Stone Tower Temple
Effective Weapons	Zora Boomerangs Hero's Bow

Desbrekos (デスプレコ, Desupureko) are enemies that reside in the waters of the Great Bay Temple and the Great Bay of Majora's Mask. They seem to be a deadlier version of the lethal Skullfish. Once they sense an enemy’s presence, they attack and try to cause injury to the target. They are often found in groups and will attack as such. Killing it in the same room will kill the rest of the Skullfish.

The best weapons against Desbreko are the Boomerangs of Zora Link and the Hero's Bow. To ensure safety when entering the water, one should first clear the water of these deadly fish. Zora Link's Guitar of Waves greatly resembles a Desbreko, possibly being made out of one.