This is a medieval manuscript illustration depicting a fantastical sea creature. The creature is fish-like in shape, with a long, curved body covered in speckled markings. It has a large head with a gaping mouth and a single, prominent horn protruding from its snout. The creature appears to be emerging from a wavy, blue body of water. The background is a golden-yellow color. The illustration is framed by a decorative border with a repeating pattern of stylized shapes. Above the image is a line of text in an old script. The style is characteristic of medieval illuminated manuscripts, with flat colors, stylized forms, and a focus on symbolic representation rather than realistic depiction.