Leech

Leeches are small slug-like creatures that live in water. They feed on human blood and/or other small invertebrates. Leeches are used in potion-making: to make the Polyjuice Potion, four unsucculated leeches are required. Also, a dash of leech juice is a required ingredient in the making of the Shrinking Solution.

Appearances

 * Harry Potter and the Chamber of Secrets
 * Harry Potter and the Chamber of Secrets (film)
 * Harry Potter and the Chamber of Secrets (video game)
 * Harry Potter and the Prisoner of Azkaban
 * Harry Potter and the Prisoner of Azkaban (video game)