is one piece episode 354 filler?

Franky hears of Luffy's meeting with Laboon and Sanji explains the events. Chopper is quite surprised about how the whale swallowed the Straw Hats and the same Laboon that Brook is interested in.

The group tells Chopper and the rest of how they also met Crocus inside the whale and the time Laboon waited for his friends to come back to him. After Luffy's fight with Laboon and the departure for Whisky Peak, Sanji informs the rest of how Laboon is still waiting for his friends.

Zoro learns that one of Laboon's old friends is Brook.