is one piece episode 178 filler?

Zoro is worried about Nami and Gan Fall, who had been swallowed by the Python. Wyper continues to shoot the Burn Bazooka towards Nola so as to get Aisa out of the snake's stomach.

Zoro is faced with the difficulty of fighting Ohm who seems to know Zoro's exact location and attacks him with his Sword. On defeating a Shandia warrior, Zoro attempted to use the opportunity to defeat Ohm using the attack Nitoryu: Taka Nami.

However, his attack was countered by Ohm's Eizen Back. Ohm then attacked again using the Eizen Fan, Eizen Fork and Eizen Fleuret.