Heat-Seekers

Heat-Seekers, or known as Sandcrawlers, are gigantic-worms that live in Sandopolis Zone in the Knuckles the Echidna comics.

Description
Taking the appearance of a giant, green worm, one of these creatures attacked Knuckles and Archimedes, both where transported there thanks to a reawaken-Enerjak, while in the Sandopolis Zone. Archimedes led it to a rock while the Heat-Seeker was underground. The rock underground resulted its injury and soon, it died. (KM #2