Alien Parasite

Alien parasites are used to be antagonists in the adult animated science fiction sitcom, Rick and Morty, but are now introduced to real life Earth as a totally peaceful sapient species. They are formerly the main antagonists in the fourth episode of the second season of Rick and Morty called "Total Rickall" (although they are seen in egg form in the second episode of the second season called "Mortynight Run"). They are a species of shape-shifting alien parasites that start off as eggs before turning into their main form. Their original appearance is a humanoid snake like form and revert to this form after being killed.