is one piece episode 167 filler?

Usopp, wanting to urinate and being too scared to go alone, asks Zoro to accompany him, but Zoro refused. Usopp goes on his own and notices that someone is on the ship fixing it.

Shocked by the mysterious shadow, Usopp blacks out only to be found by Zoro the next day. The Priests are summoned by Enel, but they begin fighting against one another seeing who is the strongest among the three priests.

While arguing amongst themselves, they question where Enel is. Then a bolt of lightning comes and Enel appears.