|"Is this all real? Or has this been happening inside my head?"
The topic of this article is of a real-life subject that has been mentioned "in-universe" in a canon source. The Harry Potter Wiki is written from the perspective that all information presented in canon is true (e.g., Hogwarts really existed), and, as such, details contained in this article may differ from real world facts.
A Puffer-fish was a fish that could inflate its own body in defence.
- Harry Potter and the Chamber of Secrets (First mentioned)
- LEGO Harry Potter: Years 1-4 (NDS and IPhone versions only) (First appearance)
- Pottermore (Mentioned only)