A labeled anatomical diagram of a tuna rendered in bold black lines and sections against a bright coral pink ground, with Japanese characters and English labels identifying each cut and part of the fish. The composition centers the fish in profile with a direct, instructional approach, accented by stark black text at the base reading "マグロの解剖学 TUNA ANATOMY" in strong capital lettering. Sewn from a durable canvas-like exterior with a soft lining and made to order, in three sizes up to one that fits a tablet. A catchall for toiletries, art supplies, or small electronics, carrying an independent artist's work instead of a plain zip bag.