Comparison of gap formation in counter-rotating disks and a giant plant bearing protoplanetary disk assuming 5 M_Jup (upper row) and 2.5 M_Jup (lower row) planetary mass, respectively. Left panel: density distribution in the counter-rotating disk models at 0.6 Myr. Middle panel: density distribution in giant planet bearing disk model after 1000 orbits of the giant planet. Right panel: comparison of azimuthally averaged density profiles for both models. The density is scaled up by 50 in planet-bearing disk model to match the density profiles in the inner disk.