Species information

Sentient to an
unknown degree

Eye colour

Black (white, if blind)

Hair colour


Related to


Native range

Island of Borneo,
South-east Asia

Length of average adult

Larger than 15 feet

  • Capable of speaking
    human speech
  • Taste for human flesh
MoM Classification



Most likely Beast

An Acromantula is a species of giant spider, native to the rainforests of Southeast Asia, particularly Borneo where it inhabits dense jungle. Acromantulas are believed to be a wizard-bred species, designed to guard dwellings or treasure hoards, and were first created before the Ban on Experimental Breeding in 1965. These giant spiders, with a taste for human flesh, were first spotted in 1794.

Physical descriptionEdit

"Spiders. Not tiny spiders like those surging over the leaves below. Spiders the size of carthorses, eight-eyed, eight-legged, black, hairy, gigantic. The massive specimen that was carrying Harry made its way down the steep slope toward a misty, domed web in the very centre of the hollow, while its fellows closed in all around it, clicking their pincers excitedly at the sight of its load."
Harry Potter's description of the acromantulas[src]

The acromantulas sported eight, black eyes (white if blind) and are typically covered in thick black hair, with a leg span that can reach up to fifteen feet. They possess a set of giant chelicerae which they use to eat live prey or their own dead kin. Their pincers produce a clicking sound when they are agitated or excited.[1]


These fangs contain highly toxic venom, valued at 100 Galleons a pint, which is even potent for a short time after death.[2] Their eggs are Class A Non-Tradeable Material.[1]


The female is usually larger than the male, and can lay up to one hundred soft, wide, beach ball-sized eggs at a time. They usually hatch in six to eight weeks.[1]


The name Acromantula has the Greek acro-, meaning high or "peak," and -mantula, from the English "tarantula." True to their name, Acromantulas are massive arachnids who tend to spin their expansive webs high in tree tops. Despite the names bearing a phonetic similarity to Tarantulas, they appear more like Wolf Spiders and are, in all depictions, araneomorphae.


Acromantulas tend to reside in thick jungles and heavily forested areas, and their webs are large and dome-shaped.[1][3]

Acromantulas in the Wizarding WorldEdit


A colony of Acromantulas was established in the Forbidden Forest at Hogwarts School of Witchcraft and Wizardry by Aragog and his mate, Mosag. At first, Hagrid used to keep Aragog in a cupboard box in the school's dungeons. Aragog was released into the Forest by Rubeus Hagrid at about the time of the 1943 opening of the Chamber of Secrets[3]

During the Third Task of the Triwizard Tournament in 1995, an Acromantula was positioned close to the Triwizard Cup. Harry Potter and Cedric Diggory joined forces to defeat it.[4]


The Forbidden Forest Acromantula colony participated in the Battle of Hogwarts in 1998, when the Death Eaters drove them out of the Forest, and towards Hogwarts Castle. Rubeus Hagrid was captured by the Death Eaters after he was lost among the swarm in his efforts to protect Aragog's offspring.

The eight eyes of the Acromantula are used to symbolize the number eight in the runic alphabet.[5]

Behind the scenesEdit

  • In the film adaptation of Harry Potter and the Chamber of Secrets, Harry Potter used Arania Exumai, a stunning or killing spell for use against spiders, while attempting to escape the Acromantula colony. He learned the spell from Tom Riddle upon visiting the latter's sixteen year old memory in his diary. The spell was never mentioned in the book.
  • The Acromantulas in the film closely resemble wolf spiders than actual tarantulas.
  • In Fantastic Beasts and Where to Find Them, Ron pens in nine "X"s to Acromantula's Classification. This is a reference to Ron's fear of spiders.
  • The basilisk is the worst enemy of all spiders, feared so much that the spiders do not even speak of it. It is their worst enemy due to the basilisk's killing gaze and the fact that spiders have many eyes. In the case of Acromantulas, they have 8 eyes, making them highly vulnerable. They also have no eyelids.


Notes and referencesEdit

See alsoEdit

The Harry Potter Compendium has 0 images related to Acromantula.

Study of Ancient Runes
Ancient Runes Made Easy
Professor: Bathsheda Babbling
Textbooks: Advanced Rune Translation · Ancient Runes Made Easy · Magical Hieroglyphs and Logograms · Rune Dictionary · Spellman's Syllabary
Known Runes: Acromantula · Demiguise · Ehwaz · Eihwaz · Fwooper · Graphorn · Hydra · Quintaped · Runespoor · Salamander · Unicorn · Unknown · Mark of Merlin

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