Only two of these clones are encountered by Twinsen during FunFrock's regime. This makes it likely they are the "very special" experimental clones the rabibunny informer at Tippet island mentions. They have a rotor in their backs, allowing them to float. They are armed with a pair of hand guns that shoot asterisk-shaped projectiles at a very fast rate.
The two flying groboclones are encountered in the practice swimming pool of FunFrock's secret fortress.