is one piece episode 288 filler?

Nami begins to run up the stairs to face Kalifa, when Kumadori stomps in wanting to continue his fight with her. Chopper tells Nami to continue while he faces him.

He then transforms into Arm point and attacks Kumadori, telling him that he will be his opponent. Meanwhile, Chimney and Gonbe save Luffy from drowning, and pump out all the water he took in.

Once revived, Luffy goes back to his pursuit of Robin. Not thinking things through, he begins to stretch his arms and grab a hold of a nearby cannon, preparing to launch off of it in hopes that he will fly across the whirlpools.