One Piece has finally returned from its hiatus, launching Monkey D. Luffy and the Straw Hat Pirates back onto our screens for more adventures. The new set of episodes continue the Egghead arc ...

If you're setting sail with the Straw Hats, there's a lot of One Piece ... episodes, only around 9% of them are filler, or 95 episodes. The storylines are often just as wild as any other season ...

But what are filler episodes, exactly? How many One Piece canon filler episodes are there, and which ones are actually worth watching? Keep reading to find out.