Sandworm are enemies from The Legend of Zelda: Phantom Hourglass.
Sandworms dwell in sandish areas of Isle of Gust and Temple of Wind. They are creature that triggered towards sound. Walking very slowly will keep them at bay, but if Link run, they will come charging from underground towards him. If caught, rub the stylus on the screen quickly to shake free. Their one weakness are Bombs. Just toss one near them and it will gobble it up and soon explode. If Sandworms charging towards Link, he can escape by running away from sandish areas or toss a bomb to distract them.