One piece - Season 5 [Audio: Eng], Episode 12: Venture Into the Devil's Sea! The Mysterious Skeleton Floating Through the Fog
Trailer
Driving by his deep will of acquiring wealth, a young ambitious courageous teenager guy named Monkey D. Luffy, goes in a long journey, in order to find out the large treasure of an old pirate named One Piece, but he cannot do it alone, so he accompanies his friends who stand by him and help him in finding out the treasure.