caption: The image shows an open book with a page from a medieval manuscript featuring a drawing of a fish and text. The book is open to a page with intricate details of the fish, including its scales, fins, and eyes, as well as its fins and tail. The text is written in a calligraphic font and is surrounded by a decorative border. The colors used in the drawing are mostly shades of blue and green, giving the book a vibrant and eye-catching look.