is one piece episode 775 filler?

A flying squirrel mink named Musatobi glides down to Zunesha's front left leg and examines it. When he sees the extent of the leg's damage, he becomes shocked and quickly flies back up to warn the others.

On Zou, Nekomamushi agrees to give Luffy food for his journey, and Musatobi races to the crowd to warn them about Zunesha's injuries. Zunesha's injured leg then gives out slightly, causing Zou to shake again.

The minks prepare to take imminent action, and Luffy offers his crew's help in treating Zunesha.