There are a ton of bugs and creatures that you can catch in Bugsnax. You will need to do a specific task and use a specific set of tools in order to catch an individual creature. Upon catching one of these creatures, you can use them to be your companions in the game and dress them with clothing pieces that you have.
This guide will show you how to catch a Spaghider in Bugsnax!
Bugsnax: How To Catch A Spaghider
Once you reach this area, you will see the Spaghider on top of a tree and an Eggler roaming around in a circle, you will need to attach a ball of cheese on the Eggler to make the Spaghider attracted to it.

The Spaghider will start burning in flames and become vulnerable. Run to the nearest shrinking powder and grab a vase which you will need to throw it at the Spaghider.

You will need to get your tripwire gun and aim it towards the tree which will make the Spaghider hit the barrier and become vulnerable to the net.

Once the Spaghider is hit by the barrier, grab your grappling gun and pick him up.

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