As their name suggests, they are blind white maggots that lack any appendages.
Maggots simply crawl around the room blindly in cardinal directions, not targeting Isaac but still can deal a contact damage. Because they don't follow Isaac and move very slowly, it is easy to avoid them. Maggots are thus only dangerous in great numbers and enclosed areas, where it can be difficult shooting at them safely without running into them.
- They appear in the original game.