

The second stage is when the parasite finds its desired host and enters its body, maturing in a matter of minutes inside to become in sync with the host and replacing the body part it inhabits. The eggs or spores they emerge from resemble green airborne tennis balls filled with goo, or viruses. In the anime, they're small, approximately the length of a finger, while they are two or three times larger in the manga. The larval form resembles a green, almost translucent worm or snake with yellow eyes protruding out of its head, and a drill-like appendage on the front of its head. Parasites go through two main stages of development: a larval or primal form and a matured, humanlike form.
