What is thriller bark one piece?

Thriller Bark is the 18th arc in the One Piece anime and manga series. It takes place after the Enies Lobby arc and before the Sabaody Archipelago arc. This arc features the Straw Hat Pirates and their adventures on a haunted ship called Thriller Bark, which is controlled by the infamous pirate Gekko Moriah. The arc introduces many new characters such as the zombie soldiers, the members of the Moriah Pirates, and the mysterious perverted scientist Dr. Hogback. The arc also features a new crew member, Brook, a wandering musician who becomes the Straw Hat's new musician. This arc is full of twists and turns and is known for its suspenseful and frightening atmosphere, making it a popular fan favorite.