Orchestra of the Sea

The Orchestra of the Sea is a four-page omake accompanying Chapter 304, serving as a frame story for its color spread as well as an unofficial interlude between the Skypiea Arc and the Long Ring Long Land Arc.

It is technically the first omake featured under the Strawhat Theater (麦わら劇場) label. However, it has little in common with later entries, which are exclusive to log books and databooks, always drawn in a super-deformed style, and never colored.

Summary
The Straw Hat Pirates gather on a bandstand in the middle of the ocean, planning to lure out fish for dinner by playing beautiful music (though Zoro idly notes that Chopper would make more effective bait, much to Chopper's horror). Once they start playing, the legendary Rainbow Moray Eel Brothers appear.

Unfortunately, Luffy and the others are so dazzled by the sight that they forget to actually catch the eels, which enrages Nami (and earns Luffy a fresh beating).

Instruments

 * Luffy: Cymbals and harmonica
 * Zoro: African drumset
 * Sanji: Trombone
 * Usopp: Mandolin
 * Nami: Grand Piano
 * Chopper: Maracas
 * Robin: Harp

Trivia

 * The caption for the major color image for the chapter is a line from the Louis Armstrong song "What a Wonderful World".