is one piece episode 166 filler?

The Straw Hats begin to make their preparation to find the City of Gold. Sanji prepares to cook while Zoro, Chopper, and Robin go in search of ingredients.

Usopp prepares to fix the ship and Nami prepares the plan. Gan Fall is still resting and recuperating from his injuries.

Later on, the crew get together; Nami has a hunch and tells them the possible location of the city of gold. Chopper also tells the crew of the flock of large South Birds who rescued them and how they were calling Gan Fall, God.