is one piece episode 309 filler?

The Straw Hat Pirates are still fighting the Marines, while Luffy holds off Lucci, on the Bridge of Hesitation. Franky is shown firing into a crowd of Marines, which prompts one who is wearing boxing gloves to charge him.

Franky easily dispatches him with raw power, throwing him back past the group he is fighting. The Marines are shocked at how strong the pirates are and how they are easily beating the captains of the ships they came from.

As Luffy and Lucci continue their fight, Nami and Nico Robin are shown out of breath and surrounded by Marines.