is one piece episode 17 filler?

Kuro attempts to use Shakushi on Luffy once again, but this time Luffy uses his rubber body to restrain him and prevent him from moving. Stretching his neck back, he uses Gomu Gomu no Kane, a powerful headbutt knocking Kuro unconscious and destroying his glasses.

Concluding the battle, Luffy orders the remaining Black Cat Pirates to leave the island, taking Kuro with them. Simultaneously, Zoro and Usopp arrive to protect Kaya from Jango.

Zoro cuts down a tree branch, clearing the way for Usopp's Hissatsu: Kayaku Boshi, a fired pellet that explodes in Jango's face, defeating him.