is one piece episode 2 filler?

Luffy and Koby arrive at Shells Town, a town where a Marine base is stationed. They find their target, Roronoa Zoro, crucified at the base.

A small girl, Rika, sneaks into the base to offer Zoro onigiri, but she is stopped by Helmeppo, a snobbish man who destroys the onigiri. However, Zoro later eats the dirt-stained rice.

Outside the Marine base, Rika reveals that the town was run by a tyrannical Captain Morgan, who allowed his son, Helmeppo, to regularly abuse his citizens. One day, Helmeppo brought a hostile wolf into a bar which attacked the customers and ate their food.