Poptops are a player created unique monster type. They were submitted by Tomservo as an entry in the MonsterMonster contest, taking top prize which was addition of the monster to Starbound.
They can be found in lush and jungle biomes. They will regularly whistle the Starbound theme song. There is a larger version of this monster as well, the Adult Poptop.
There is also an ingame plush toy object based on a Poptop.
- ↑ http://community.playstarbound.com/index.php?threads/the-poptop-educational-pamphlet.3407/