Napoleonfish

The napoleonfish is a big blue fish with a large humped head. One of a group of fish which all sell for 10,000 Bells, this fish appears during late summer in the ocean. Like all other oceanic fish, the napoleonfish appears in the back tank, when placed in the museum.

Further information
The napoleonfish is actually called the humphead wrasse, and males are larger than females. The fish, unfortunately, is endangered. It is one of the strange fish that change gender as they grow older.