is one piece episode 444 filler?

Buggy and Galdino are hiding from the guards at Level 2. After making sure that there are no guards left, they go around opening cells and letting prisoners free so that they can create a riot.

At Level 4, New Kama citizens storm up the stairs. The escapees (Luffy, Jinbe, Crocodile, Ivankov, Inazuma, Bon Kurei and Daz Bonez) attack the guards, trying to get to Level 3.

Ivankov and Luffy throw the guards in the lake of fire. In one of the jailer rooms, Hannyabal freaks out, losing his chances to be Chief Warden.