A large school of Neutron Flys can be seen flying around in unison, changing colors randomly inside of Five Pebbles' superstructure. They move around in the zero gravity environment in patterns while making high-pitch, soft, echoy whistling sounds. They have white oval bodies with a circular eyes looking thing in the middle and two long 'tails'. They're small, about the size of a small football. They're completely harmless don't really have a consciousness, just doing what it's programmed to do.