is one piece episode 555 filler?

The remaining fish-man pirates are shocked at the ease at which Luffy brought down many of their numbers. They begin retreating but Zeo asks them where they are going, saying that if they run away, they deserve death.

Zeo states that even though they have lost 50,000, they are still 50,000 strong. Zeo continues by saying that the Straw Hat Pirates are their worst enemy and Jinbe is a betrayer.

The outlaws are encouraged by Zeo’s prep talk and regain their fighting spirit. Zoro tells Luffy that he wished Luffy had not reduced the numbers so drastically.