is one piece episode 81 filler?

Sanji and Luffy encounter a herd of lapahns. While under attack, Sanji tells Luffy not to attack nor be struck by the animals, as Nami would receive the impact too.

Sanji uses Flanchet Shoot on a lapahn. At a town, Kureha treats a sick boy by doing a little operation and giving him antibiotics.

She then charges a fee of food, beverages, trash bags, and 50% of the restaurant's assets. After the boy awakens and gives her his thanks, she decides to make a 1% discount on the fee.

Zoro is outside the ship, training his body to resist the cold while Karoo is watching covered in a blanket.