Rosario

Rosario was the giant pet goldfish of Muchigoro in the sixth One Piece movie.

Appearance
Rosario is a giant red fish with a hard metallic shell. The shell has jewels embedded on the top part and on the forehead.

History
When the Straw Hat Pirates participated in the first Trial of Hell issued by the Baron Omatsuri, they were initially tricked into thinking they had to catch small goldfish, but eventually caught her due to Chopper's Guard Point.

Trivia

 * "Rosário" is the Portuguese word for "rosary".