Moldworm

Moldworms are large-mouthed subterranean worm-like creatures that first appear in The Legend of Zelda: The Minish Cap.

The Legend of Zelda: The Minish Cap
They hide under the ground and try to eat Link when he is small. If they succeed, he will take damage and become dirty, which attracts Pestos to him.

The Legend of Zelda: Twilight Princess
Appearing under the name "Moldorm" in English, they now pursue Link from under the sand in Gerudo Desert and early in the Arbiter's Grounds, leaping at him when they get close enough. They have three large fangs in this game.

The Legend of Zelda: Phantom Hourglass
Now called "Sandworms" in English, they appear much larger and live on the Isle of Gust and the Temple of Wind. Here, they hide under the sand and will burst out to eat Link if they hear him making too much noise, likely in reference to giant sand worms in franchises such as Dune and Tremors. They will also go after bombs, which will kill them, and will in fact stop pursuing Link in order to eat a bomb.

The Legend of Zelda: Skyward Sword
Again called "Moldorms" in English, they appear in Mogma Mitts-accessible tunnels and appear centipede like. They have weak tail ends, similar to those of boss Moldorms, inspired by the enlarged abdomen of the honey ant. Destroying the tail end causes the Moldorm to shorten and pick up speed, but it will be defeated after three hits.