is one piece episode 342 filler?

Nami, Chopper, and Usopp are trying to escape from the zombies but the doors are locked, as they find a fireplace, and the three attempt to block the passage preventing them to enter. The three enter in Cindry's room and Nami reads the book about her past of being an actress of how she died on the stage.

Nami sees a treasure chest and asks Usopp to open it but when he does it turns out to be a Jack-in-the-Box zombie. Usopp, Nami, and Chopper then escape.

Ryuma comes up and talks to the zombies never to fear and that he shall herd them up and laughs maniacally like Brook did.