The image is a vintage lithograph or drawing of two fish skeletons. Both fish are depicted in profile, with a clear view of their bony structures. The top fish is more elongated and streamlined, with a prominent, slightly curved horn-like projection extending from its head. Its fins are long and flowing, and the skeletal structure is detailed, showing the individual bones of the spine, ribs, and fins. The bottom fish is more compact and rounded, with a slightly more robust skeletal structure. Its fins are shorter and more rounded, and the overall impression is of a sturdier fish. The drawing is executed in a delicate, precise style, with fine lines and subtle shading to create a sense of depth and texture. The background is a pale, creamy color, which helps to highlight the dark, intricate details of the fish skeletons. Below the images, there are labels in a vintage font, identifying the fish species. The text is in a foreign language, likely Latin or German, and includes the names 'Luncus cornatus' and 'Acanthurus nigros'.