The Tarantulas in this movie.
None of the tarantulas in this film are dangerous or look aggressive in any way.
Most of them are the Mexican Redknee tarantula
https://en.wikipedia.org/wiki/Mexican_redknee_tarantula
or these kind...
https://en.wikipedia.org/wiki/Theraphosinae
All about tarantulas here at this Wikipedia link:
https://en.wikipedia.org/wiki/Tarantula
The tarantulas that the characters are actually referring to in the movie are actually the Brazilian wondering spider (the ones that hide in banana crates or coffee crates) and whom can kill with one bite. They are not actual tarantulas but they have the appearance of them.
https://en.wikipedia.org/wiki/Brazilian_wandering_spider