Revealing mistake: When the scientists inject the mouse with poison, they put it in a jar. The, after they place it down you can see someone's hand swap the jar for one containing a dead mouse. You can even hear it. (01:17:58)

Arachnophobia (1990)
Plot summary
Directed by: Frank Marshall
Starring: John Goodman, Jeff Daniels, Julian Sands, Harley Jane Kozak
Dr. Ross Jennings (Jeff Daniels) and his family have moved to the small town of Canaima, California to become its resident physician. Things go wrong for them as residents begin to die and evidence points to an infestation of poisonous spiders.
Dr. Ross Jennings: Not the Chateau.
Trivia: Since spiders really aren't a trainable type of animal, the filmmakers used hairdryers to blow on them, in order to get them to move correctly.
Question: Are the small spiders in the movie an actual type of spider? If so, what are they called?
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Answer: The small spiders are Avondale spiders from New Zealand. They are totally harmless to humans.
Hamster ★