Fantastic Beasts explains how Hagrid (Robbie Coltrane) got Aragog while he was a student at Hogwarts. The Fantastic Beasts saga follows Newt Scamander (Eddie Redmayne) traveling the world in pursuit of magical creatures — after having been commissioned to write a book on them — in the 1920s. While Fantastic Beasts 2 shifted the focus from Newt to Dumbledore's (Jude Law) war against his friend-turned-foe Gellert Grindelwald (Johnny Depp/Mads Mikkelsen), Newt and his fantastic beasts remained a key theme, as Newt reminds his friends, "There are no strange creatures, only blinkered people."
Much like Newt, Hagrid has had a lifelong passion for magical creatures, making it his goal to help people see even the most ferocious beasts as «seriously misunderstood creatures.» This echoes Newt's statement to Tina Goldstein (Katherine Waterston), who thought Newt was writing Fantastic Beasts and Where to Find Them as an extermination guide: "to help people understand why we should be protecting these creatures instead of killing them." Hagrid's love for Acromantulas eventually resulted in his expulsion from Hogwarts, as Tom Riddle (Christian Coulson) caught Hagrid caring for Aragog and framed him for Myrtle's death. But J.K. Rowling hasn't yet revealed the exact details of how Hagrid got Aragog.
Related: Hidden Fantastic Beasts 3 Detail Links Grindelwald To Voldemort
In Harry Potter and the Chamber of Secrets, Aragog tells Harry (Daniel Radcliffe) he came to Hogwarts from a distant land,“in the pocket of a traveler.” Newt is famous for keeping magical creatures in his pockets, his bowtruckle Pickett being a trusty sidekick by Fantastic Beasts 3. Moreover, Newt did travel the world before returning to the UK and continuing his
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