This is a medieval illustration of a fantastical creature—a fish with wings. The fish is depicted in profile, with a long, slender body covered in green scales. Its head is purple, and it has a slightly open mouth revealing teeth. Attached to its back is a large, red wing with clearly defined feathers. The creature appears to be flying or suspended in the air. The illustration is framed by a decorative border. The border consists of a square with a dark blue and gold pattern. Within the square, there's a repeating motif of stylized leaves or foliage. The background is a warm, golden-brown color. The style of the illustration is characteristic of medieval illuminated manuscripts, with flat colors, stylized forms, and a focus on symbolic representation.