Puffer-fish eyes are the eyes of the puffer-fish, a fish that can inflate its body for defence. They are an ingredient in the Swelling Solution. In a Potions lesson in December of 1992, Draco Malfoy was flicking his spare puffer-fish eyes at Harry Potter to annoy him. Puffer-fish eyes can be bought in Diagon Alley for 5 galleons per jar.