The worm is an invertebrate animal consisting of a tube-like body with no legs.
Worms can be used as bait for fish. The Hogwarts potions champion dug up some worms to use for this purpose during the Wizarding Schools Potions Championship, planning to taint the caught fish with Shrinking Solution and feed them to the River Troll blocking their path.
Types of worm
- Harry Potter and the Chamber of Secrets (First appearance)
- Harry Potter and the Prisoner of Azkaban
- Harry Potter and the Goblet of Fire (Mentioned only)
- Harry Potter and the Order of the Phoenix (Mentioned only)
- Harry Potter and the Half-Blood Prince (Mentioned only)
- Harry Potter and the Deathly Hallows (Mentioned only)
- The Tales of Beedle the Bard
- Wonderbook: Book of Potions