Episode 561

"Battle Royal! The Crew vs. the New Fishman Pirates!" is the 561st episode of the One Piece anime.

Short Summary
Luffy tries to protect Shirahoshi along with her three brothers helping also against Hody Jones as the captain of the New Fishman Pirates is hell bent on killing the Mermaid Princess but seems to have an ulterior motive as Vander Decken IX is slowly loosing focus, consciousness and his grip on the powers that he weilds that keeps the massive ship Noah (after Decken's near fatal injury from Hody Jones earlier) from falling/sinking downwards on top of the Fishman Islands and its occupents therefore killing them.

Meanwhile the other Straw Hat Pirates face off against the New Fishman Pirates officers who are equally eager to finish their opponents off as everyone prepares for the fight of their lives once again as the fate of the people of Fishman Island rests on Luffy's hands and his crew.

Anime Notes

 * The anime adds a scene with Sanji kicking Wadatsumi in the face.
 * In the manga, Ikaros Much only bends his back when he was close to the electrocuted underlings. In the anime, one of them came in contact with him, shocking him as well.
 * Unlike in the manga, Ikaros pierced Brook multiple times before realizing that his spears have no effect.
 * In the manga, Decken slipped and hit his head before getting on his feet. In the anime, Decken was preparing to throw an axe at Hody, but the weight of the axe caused Decken to fall down.