Quote Originally Posted by UChessmaster View Post
I don`t get it, why would Decken need a bubble? he`s a fishman too.
The same reason Decken is in a bubble in the last page. Even though he can breathe in water, he still gets paralyzed due to the devil fruit power.

Quote Originally Posted by toonice714 View Post
I thought the coating wasn't so much for the crew to breathe under water but also for the ship to be able to make the journey to fishmen island.otherwise they would've ended up at marjorea(sp?). The whole reason for the coating was to avoid that so I just assumed all ships under the sea needed coating to stay under. If the fishmen don't need coating on their ships what is so different about their vessels that allows them to avoid that process. B/c it was stated that the underwater pressure would break the 1000 sunny go.
Eh, well, the faux-science of One Piece is arguable, but if I could propose a reason why something would collapse under the water pressure, I could suggest it's due to the oxygen contained within the vessel. The reason people die from submerging too fast is because the air in their tanks get compressed due to the water pressure. Since the ship (and their submarine, for that matter) has air for the pirates to breathe, that air can become a vacuum that causes the ship to cave in on itself. The Flying Dutchess is hardly a sealed vessel, as evident by holes all in the hull of the ship. It's basically just pieces of wood drifting along the ocean floor.