Whelk

The whelk is a type of sea snail, particularly referring to those of the family. While on vacation in the Isle of Wight during July of 1991, Marjorie Dursley ate a "funny" whelk and thus fell ill. She wrote a postcard to her brother Vernon to inform him of this occurrence.

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Philosopher's Stone (film)