Go to the "
Fungi Field" telerouter point located in the first biome, halfway up the starplant. Directly underneath this telerouter you will find a POD Challenge as well as some water. Near the water, you will find a
small shelled critter that you'll want to pick up with both hands. Take the critter to a telerouter, and select
The Moon while holding it to unlock the achievement.
You can use this critter to quickly gain two more achievements: