The image is a vintage, black and white engraving of a fish. The fish is depicted in profile, facing left. It has a streamlined, elongated body covered in detailed scales. The head features a prominent eye with a detailed pupil, and a slightly open mouth. A small barb or antenna protrudes from the top of its head. The fins are intricately drawn, with visible rays and edges. The tail is forked and pointed. The fish is contained within a rectangular border, and the number '106' and the name 'T.H. Bartholini' are printed above the border in a classic font. The style of the engraving suggests it is from a historical scientific or anatomical text.