Lionfish have extremely long and separated spines. Crushed into a powder, these spines can be used in healing potions, such as the Wiggenweld Potion. It is also an ingredient of the Herbicide Potion as well as some more complicated ones. The ingredient can be bought from some shops, notably The Apothecary in Diagon Alley.
- Harry Potter and the Philosopher's Stone (First appearance)
- Harry Potter and the Goblet of Fire (Mentioned only)
- Harry Potter and the Half-Blood Prince (video game)
- Pottermore (Mentioned only)