Pygos (Pygocentrus nattereri) are a weaker, less-developed type of the ultimo cross-species, Nattie. They are half human and half piranha and appear as mini-bosses in the video game The Amazing Spider-Man.
Nothing else is known of these creatures other than that they were tested as humans with the same type of serum that Nattie was, however, a weaker version of it. They look similar to Nattie in physical appearance, other than different colors of skin and minor features here and there.
- See also: Nattie
Pygos act similar to their "leader", Nattie, in terms of combat; they scratch, claw, bite, and pretty much do as much as they can to take out their prey.