is one piece episode 63 filler?

Crocus begins to tell the story of Laboon to the Straw Hat Pirates. He explains that Laboon has been waiting for a group of pirates for over fifty years.

Fifty years ago, Laboon came along with a group of pirates known as the Rumbar Pirates. The pirates did not wish to bring the young whale in their dangerous journey and wanted to leave it in West Blue, where it originally inhabited but it had followed the pirates on their journey.

To Laboon, the pirates were like its own family.