is one piece episode 541 filler?

The story now goes 15 years into the past, as Neptune, holding a baby Shirahoshi, comments on how Tiger's actions will stop Fish-Man Island from attending the World Summit for a while. Otohime comments that they could never have stopped him after hearing the voice in his heart.

Tiger's attack on Mary Geoise is spread throughout the whole island and everyone celebrates his attack and freeing the slaves, calling him the hero of Fish-Man Island.