is one piece episode 373 filler?

Oars lies seemingly broken along with Moria while the Rolling Pirates cheer for Luffy's victory. Usopp tries to wake Luffy up as he was exhausted from using the shadows for his nightmare form.

With sunrise approaching, Lola hoped Luffy would force Moria to return the shadows to the rightful owners. Suddenly, Oars and Moria recover, frightening the Rolling Pirates who have run out of options.

The crew plans to get to the forest as the sun will be blocked out, but the Straw Hats recover. Luffy insists on attempting a coup de grace on Oars, but is worn out.