The Turtle Rock Guardian is a mini-boss from Link's Awakening. Its appearance is that of a demonic turtle head that rests across the entrance to Turtle Rock. When Link plays the "Frog's Song of Soul", it comes to life and attacks.
The Turtle Rock Guardian attacks by extending its neck and thrusting its head at Link. It is only vulnerable to the sword. Upon being defeated, the head disappears, opening the way into Turtle Rock.