Here I show you the safest way to catch a tarantula.
You walk up to it with your net out, and whenever it's legs come up in the air you stop until it puts its legs down. Keep doing this until you are close enough to it and catch it.
It isn't the fastest way to do it but it is the safest. If you want a faster way, check it out in the link below.
• How To Catch A Tarantula - Animal Crossing...