is one piece episode 551 filler?

Hody watches the destruction he had unleashed with his enhanced water bullet, and Ikaros comments on how Hody was writhing in agony by the Energy Steroid overdose before his transformation. The citizens watch in horror not only the destruction of the district, but the utter defeat of Neptune's army, with both the Minister of the Right and Minister of the Left left critically injured in the attack.

King Neptune watched helplessly as his soldiers were wiped out, and Hody resumes his path to Gyoncorde Plaza.