Despite this game not featuring Metroids, in the demo version (Metroid Prime Hunters: First Hunt) the primary enemy is the Mochtroid. Mochtroids are failed Metroid clones which previously had only appeared in Super Metroid. They are distinguishable from Metroids as they have fewer nuclei, are far easier to kill, have an all around more sickly look (they are not as spherical or well developed as a true Metroid) and have trouble latching onto their victims (you can walk out of them, whereas to unlatch a Metroid you must use a bomb).