Fish-Man Island Arc

The Fishman Island arc is the twenty-fifth story arc in the series, and the second in the Straw Hats Return Saga of the One Piece series, continuing on from the Return to Saboady arc. The Straw Hat finally head for Fishman Island after their two hiatus. But many surprises await them as they head for the undersea destination.

After the Departure: Last Thoughts from Shabody Once More.
After the Straw Hats escape, we go to a section Shabody known as "No Man's Land". Coribou and Caribou along with their crew have captured the Impostor Straw Hats and are digging their graves. The Fakes plead with the brothers to let them go. But they refuse, revealing that they planned to kill the real Straw Hats from the inside after joining them and were not amused when they found out they joined phonies. When Fake Sanji continues to plead, Caribou reveals he is a devil fruit user, turning his arm into a gooey like substance and smothering his face. The Fake Sogeking tries to shoot him, but the cannon ends up absorbed into his body, revealing that its a logia type. Caribou orders his men to bury the Fakes while he excited he managed to confirm the real Straw Hats.

Back in Grove 46, Sentoumaru reports back to his base. Mentioning he captured the Demalo Blackand most of the pirates though the Caribou Brothers and the Fakes somehow disappeared from the plaza. He also comments on the Straw Hats new strength and tells the base to call Marine HQ in the New World and warn them that the Straw Hats have revived.

We then got to a shore where Rayleigh is watching the ocean. Shakky joins him commenting how quickly the Straw Hats left. She then asks if Rayleigh is recalling something. He jokingly comments "maybe" themn remembers when he first met Roger who surprisingly looked much like Luffy when he was younger, even wearing a straw hat. Rayleigh then comments to Shakky that destiny is slowly taking shape and that Luffy has proven himself that wear that certain Straw Hat. He also mention that us won't be a bad idea to live longer.

Undersea Adventure: The Route to Fishman Island
Meanwhile underwater, the Straw Hats marvel at site of the undersea world. One of which is the roots underneath Shabody as well as the huge fish swmming around. Luffy and Zoro try to catch them, earning them bumps on the head from Ussop and Chopper for nearly bursting holes in the coating bubble. Sanji asks Nami to explain more about the coating but seeing her simply move, once again give him a nosebleed that skyrockets him out of the bubble. He manages to passe through the bubble without bursting it but winds up in the ocean. Luffy manages to reach through and grab him but though is weaken once his arm in the water. He manages though and pull back Sanji. The other comment how much more weak Sanji becomes when he around women now and worries what will happen when they reach Fishman Island.

Robin then analyzes that bubbles share the shame characteristics as those on Shabody. Nami confirms it, mentioning that anything stronger to pass through the bubble will just go right through it allowing to fire the ships weapons if they need to. When Ussop inquiry what will break it, Nami answers that poking multiply holes in the bubble will indeed pop it, so they have to be careful not to let Sea King bite into it or smash into a reef. Luffy and Zoro once more try to go fishing forcing Ussop and Chopper to stop them again.

Luffy remember Hancock had fixed him food, so he brings it out for the crew while Ussop wonders why Hachi isn't guiding them like he promised two years ago. Franky, after confirming that the ship is stabilized with Nami, says he need to need to tell the crew something. In the two years that they were gone, both Hachi and Duval protected the ship the best why they could but both were heavily wounded and Hachi had to retire and head back to Fishman Island. A year after he left, the marines found out about Sunny and came to capture it, however there was one more warrior who protected the ship: Bartholomew Kuma.

The Truth Comes Out: Kuma's Selfless Action
Franky explains that after he arrived back on Shabody he had found Kuma, heavily damaged and rusted. Kuma then declared his mission completed and headed off much to Franky's confusion. Franky then found out from Rayleigh that during their battle against Kizaru Kuma had whispered to Rayleigh that he was a Revolutionary and wished to help the Straw Hats escape. After blasting the Straw Hats away, he later met with Rayleigh and told him he "doesn't have much time left". Since he was treated like a Guinea Pig with the Marine, he body was becoming more machine then human. He then made a deal with Vegapunk that before his personality completely faded to have program embedded in him to return to the Straw Hats ship and guard it till one of the Straw Hats return.

The Straw Hats are astonished that Kuma would go to great lengths to protect them, figuring that Kuman did it as a favor to Dragon. Franky then warns them that while they are indebted to Kuma for saving them, the next time they meet he'll have likely become a heartless human weapon. With that said, the group decide to eat the lunchboxes Hancock made for Luffy (once again earning Sanji's anger once he awaken and find out both truths). Unaware that the Coribou Pirates are right behind them, Coribou still obsessed with destroying them.