is one piece episode 510 filler?

The episode starts with the Gates of Justice opening, as Luffy, Rayleigh and Jinbe beat up all of the Marines on a battleship and forcing one of them to open the gates. Meanwhile, Chopper is at the Torino Kingdom, preparing to go back to Sabaody Archipelago.

The natives give him food and supplies. Chopper admits that he would prefer to stay and learn medicine on the island but he must go back to Luffy so he can help him.

He walks, but then he remembers, that he does not have transport. The giant chick appears and tells him that his dad will give him a ride.