is one piece episode 349 filler?

Tararan is in genuine pain, much to the shock of Robin and the spider mice. Franky warns Brook that Tararan is a zombie and therefore won’t be defeated by a simple cutting move.

Brook confidently tells him that the spider-monkey is, indeed finished, since zombies actually have a weakness that Brook has identified. Tararan's agony becomes more violent and a black substance flies out of his mouth towards the sky.

Brook explains that it is his soul returning to its "master". Tararan collapses and loses consciousness.

The spider mice are shocked and upset.