is one piece episode 405 filler?

Over the Sabaody Archipelago, a bubble pops, signifying Zoro's disappearance. Usopp cries in terror demanding what Kuma had done to Zoro.

Luffy cries in horror, then he and Robin dodge a slap by Monster Chopper. Robin tries to put the reindeer under control, while Luffy cries out to Zoro.

Sentomaru dodges Chopper's ferocious smash and demands to know what he is doing here. Meanwhile, Rayleigh and Kizaru continue their duel.

The latter knows that the Warlords are supposed to report to Marine Headquarters, with the former currently occupied with his fight.