is one piece episode 181 filler?

In a flashback, the Shandia Chief is shown talking to a young Wyper and other young warriors telling them about the words inscribed on the Poneglyph and how the Shandia fought hard to protect the Poneglyph. Wyper was able to use the Seastone and Reject to attack Enel, which stopped Enel's heart.

However, moments later, Enel was able to use his ability to reset the electrical waves in his heart thereby reviving himself. Enel indicated he warned Wyper initially, calling him Warrior Wyper several times which only angered Wyper who told Enel not to call his name without a reason.