is one piece episode 254 filler?

Nami is continuing to head toward Luffy's direction while the other people are remarking how brave but stupid her actions are. Tony Tony Chopper spots something in the distance in a chimney thinking it's a sea anemone but it turns out to be Zoro.

Overjoyed, Chopper heads toward Zoro at great speed. Meanwhile, Nami continues running toward the buildings that Luffy is trapped behind while remembering how Iceburg told her that Robin sacrificed herself and the entire world just to save her friends.

Kokoro is beginning to worry as she and everyone else notice a large wave of Aqua Laguna is coming.