Poison Worms in Castlevania: Circle of the Moon are different from those found in other games. They hang from the ceiling in entangled masses, similar to the Viper Swarms found in Super Castlevania IV. Occasionally, one of the worms will detach from this mass and fall and crawl to the ground. These worms will poison Nathan if he touches them. They can easily be whipped while they are still falling. Otherwise, simply sliding will crush them while they are crawling on the ground, or the Axe sub-weapon can also be used to remove the mass from the ceiling.
|Enemy Data: Poison Worm|
|Image||Name - Game|
| ''Abil: Poison|| Strong: Poison|
| Common Drop: Antidote (4%)|
Rare Drop: Magic Gauntlet (0.5%)