is one piece episode 351 filler?

Moria walks along the chains to the lifeless Oars being watched by his minions as well as the horrified Straw Hats. No matter how the shadow of Luffy struggles, Moria holds the shadow and makes it swear loyalty.

The zombie then places Luffy's shadow into Oars, making the giant monster begin to feel new life and break the chains binding it. Nami's party is horrified as the monster opens his eyes.

The Straw Hats make loud noises and are noticed by Absalom and Perona. Gyoro, Nin, and Bao block the exit.

Oars drops an ice block, hitting Dr. Hogback who admires his masterpiece.