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. Printed on smooth white card stock and made to order, artwork on the front, blank inside, envelopes included in every set. A handwritten note that arrives as an independent artist's work.