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Harry Potter Wiki

The Giant Squid was a magical beast that lived in the Great Lake, on the grounds of Hogwarts Castle. Despite the generalised fear of it and a Chocolate Frog Card describing it as "the bane" of Hogwarts students, the Giant Squid was actually semi-domesticated.[1]


The Squid passes by the Slytherin Common Room

It was very docile and helpful to the students of Hogwarts, such as when Dennis Creevey fell into the Lake, and he was immediately pushed safely back into the boat.[2] The squid was also known to have played with students, such as when Fred Weasley, George Weasley, and Lee Jordan tickled its tentacles as it was lying part way out of the lake,[3] and to have accepted food from students, such as when it received toast from Harry Potter.[4]

Early on in his time at Hogwarts, Ronald Weasley thought Tom Riddle may have received his Special Award for Services to the School for saving a teacher from the squid,[5] and in his fourth year, half-jokingly expressed his hope that there was some chance the squid would harm Viktor Krum, who was bathing in the lake.[6] Needless to say, Riddle's award had nothing to do with Hogwarts' Giant Squid,[5] and Viktor was unharmed,[6] as the squid was demonstrably not a threat to anyone.

Physical appearance

The squid had been seen as being either red[7] or purple in colour.[8] However since squid in the wild can change their colour using cells called chromatophores that lay just below the surface of the skin, it is entirely possible the Giant Squid was also able to change colours and even patterns at will.

Behind the scenes

  • J. K. Rowling once joked that the Squid is Godric Gryffindor, one of the four founders of Hogwarts. This would make it the world's largest Animagus. On the eleventh hour of every evening, the Squid would rise from the lake and transform into Gryffindor, who would wander the school grounds before returning at sunrise. She was unexpectedly taken seriously by many fans, before she was forced to clarify this was actually a joke.
  • After the release of Fantastic Beasts and Where to Find Them, fans speculated the Giant Squid may be the "dangerous creature" Newt Scamender released before being thrown out of Hogwarts. However, promotional material clarified that the creature in question was a Jarvey, shooting down the theory.

The Giant Squid in LEGO Harry Potter: Years 1-4

  • The Giant Squid has not appeared in any of the Harry Potter films. However, it was originally set to make a brief appearance in Prisoner of Azkaban during the scene where Harry rides Buckbeak over Black Lake, as evidenced by an early script.[9]

The Giant Squid's Chocolate Frog Card

  • The fact that the Giant Squid is magical may be how it is able to survive in the Black Lake as a normal giant squid is a deep-sea-dwelling creature and cannot live in fresh water such as found in inland lochs in Scotland, as the sunlight, pressure and lack of salinity, space, and food would be fatal to it - bread and toast would also be unable to be digested by it, and sticks would break its skin if they tickled it. However, as the Durmstrang ship arrived underwater and it is implied that wizards can travel to other places underwater, the giant squid may be able to do the same as the Ship and leave the loch and receive the required levels of space, salt, depth, and food whenever it needs. Its magic may also account for its lifespan: the same squid lived at least since Lily (Harry's mother) was at school, and either it, or its ancestor, appears on a petroglyph attributed to the lake's merpeople.


Notes and references