Chapter 603

Chapter 603 is titled "Keep It In Your Heart"

Short Summary
The Straw Hat Pirates are finally on their way to Fishman Island! After Nami explains the properties of a coated ship, Franky reveals why Hatchi was not there to guide them. As it turns out, the marines discovered the Thousand Sunny and tried to claim it, with Duval and Hatchi sustaining heavy casualties in the ensueing battles. Fraky also reveals that before Bartholomew Kuma was fully converted into PX-0, he made a deal with Dr. Vegapunk to secretly program himself to protect the ship until the return of the Straw Hats. As such, the Straw Hats are deeply indebted to Kuma for not only saving their lives but protecting their ship as well. The chapter ends with the Caribou Pirates in pursuit of the unaware Straw Hats.

Chapter Notes

 * A younger Roger is seen for the first time and bore an uncanny, near-identical resemblence to Luffy.
 * It is revealed that Roger was the original owner of Luffy's straw hat.
 * Caribou is revealed to have an unknown Logia ability.
 * It is revealed that Bartholomew Kuma made a deal with Dr. Vegapunk, in which he was secretly programed to protect the Thousand Sunny until the return of one of the Straw Hats.