Knifetop

Poptops are a unique monster type, found generally in tranquil environments. They wander around aimlessly whistling to themselves, but when the player draws near they get aggressive, attacking with leaping bites and now, tossing knives and sharpened objects with deft proficiency. Poptops are astoundingly adaptive, and have shown themselves to be quite resilient when faced with even the most extreme environments. Poptops are native to worlds of forest and tranquil environments, however due to the high demand for these creatures as pets, they have been spread to many worlds and planets they otherwise never would have been introduced too. This introduction of Poptops into different environments has lead to the recorded extinction of 300+ indigenous species, countless other wildlife, and lead to numerous biological adaptations and evolution within the species.

A Knifetop can be identified by its bloodied mouth, grasping onto a collection of sharp knives and objects. Able to walk at a much quicker pace than other poptops, the Knifetop shows to be significantly more agile than other of it's kind. The Knifetop is able to bear down on foes with surprising speed, and toss knives accurately even at a distance.

Knifetops are found in early section of the mission in the starting planet's dark cave.

Luna's Lab Notes
~ The Knifetop whistles the unique melody, one of Starbound's themes, called: "On the beach at night" Though it's twisted because of Knifetop's occupied mouth. The song as reference: https://www.youtube.com/watch?v=CcnnVjTW00I

~ The knives thrown by Knifetops resemble the throwing knife item that can be tossed by players.

Source:

https://github.com/sayterdarkwynd/FrackinUniverse/tree/master/monsters/walkers/poptopish/knifetop