Tarantulas are initially docile creatures that wander around the town, travelling away from the player if approached without a net. In New Leaf a docile tarantula will disappear after a while. However, if approached while holding a net, they become aggressive and freeze. If the player then misses with the net, runs, or jogs, the tarantula will charge. Tarantulas in pursuit will not stop until they have attacked the player or fallen in water. Putting away the net mid-chase has no effect on an already aggressive tarantula.
A "glitch" is known where digging up a fossil during a chase will "freeze" the tarantula. After enough time has passed, the tarantula will stop chasing and resume wandering around.
Donating to the museum
The tarantula can be donated to the Museum, followed by a small, agitated talk by Blathers, the curator.
In Wild World
"Hoo my! It's simply amazing that you were able to catch one of these monsters... Not only is it poisonous, it's as hairy as can be... Blech! Hairy and toxic... Is there any combination more vile?"
The tarantula can be found in the second room of the bug exhibit. If donated with the scorpion, the two will engage in battle. However, if just the tarantula is donated, it will follow the player's movements.
In City Folk
"Hoo, such foul fuzziness! And have you seen how fast they move? It's enough to make an owl faint. They're quite docile beasts, and it's documented that they rarely attack people... But when I look at them up close like this, I start to wonder if the experts might be wrong, eh wot?!"
- It can be found in the first enclosure on the middle terrace, which holds the scorpion, centipede, flea and fly to name a few.
The scorpion and tarantula can be seen battling with each other when both have been donated. They will circle each other, and eventually both jump into the air and collide, then begin their battle again. If only one has been donated, the respective bug will stare down the player instead.
In New Leaf
"Tarantulas are large arachnids that live in warm areas. They're sometimes kept as pets. They have sharp fangs and while it is painful if you're bitten by one, they aren't deadly to humans. What's scarier is the hair they kick off of their abdomens to protect themselves. The hair can cause serious itching and rashes wherever it sticks and can be rather difficult to remove."
The tarantula will wander in its confined area alone. If approached by a player, it will turn around to look at them. However if there is a scorpion donated as well, they will face off in a duel.