This is a medieval illustration of a fantastical fish-like creature. The creature has a long, streamlined body covered in scales, colored in shades of teal and gray. It has a prominent dorsal fin and a tail that curves upwards. The creature's head is somewhat reptilian, with a pointed snout and visible teeth. It appears to have legs with clawed feet, suggesting it can walk on land as well as swim. The creature is depicted against a textured, light green background that represents land or shallow water. The illustration is framed by a decorative border consisting of a series of repeating geometric patterns in shades of blue, gold, and red. The style of the artwork is characteristic of medieval illuminated manuscripts, with flat colors, stylized forms, and a focus on symbolic representation rather than realistic depiction.