Magma Worm

Worms are regular Badnik enemies, that made only appearance in Sonic the Hedgehog Spinball. Worms have only been featured at Toxic Caves (Toxic Pools in 8-bit version of the game), where they are described as gray robots with sharp teeth and possibly created by Doctor Robotnik.

Description
In Toxic Caves, Worms generally push their heads out of holes on side walls once Sonic has entered the section where they have been hiding all the time. Several Worms are featured on "worm loops" in pairs, where the player usually has to reach three times in order the activate hatch on the left or right side of the Worm Loop.

The player can simply hit one of Worms three times to defeat them and release the animal inside of it. As almost many other enemies in the game, the player can't directly get hurt by Worms due being on the curling ball mode, but can rather bounce the player backwards once hitting it. By using Worms to bounce on left and right at the worm loop three times rewards the player with 100,000 points.