Cedric Diggory, the other Hogwarts champion, informs Harry to submerge the egg in water and open it. There he will hear the clue. Harry does as told in the prefects' enormous collective bath. The clue mentions that merpeople have taken something of Harry's and that they must retrieve it from the Black Lake. Just as the three are trying to find a way to breathe underwater, Ron and Hermione are called to McGonagall's office. Neville tells Harry about gillyweed, which, if eaten, can let you grow webbed hands and feet and gills. During the second task, Harry follows a mermaid to where they have chained Ron, Hermione, Cho Chang, and Fleur's sister. Cho Chang is retrieved by Cedric, Victor, the Durmstrang champion, takes Hermione. Harry takes both Ron and Fleur's sister, since she did not show up.