Quadtroid

Quadtroids are an enemy species that appears in Metroid Prime: Hunters.

They were genetically engineered (presumably by the Alimbic) from leech and reptile DNA. They can crawl on almost any surface, including metal and ice, and is capable of sucking biological energy from their prey. They seek out such energy, as it is their only food source. A morph ball bomb is the only thing capable of shaking their grasp once they lock on to a target.

Quadtroids look and move very differently from the Metroids Samus is familiar with, but are in many ways the same. In the games, both latch on to Samus and drain her energy, and can only be dislodged by a bomb. Also, both were genetically engineered (the Metroids were created by the Chozo to fight the X parasites), and both species' names end in "troid". The significance of these similarities is unknown, as the species come from different galaxies.