These mermaid prints are reproductions of pictures by well-known artists. They depict mermaids in a style that attempts to convey the fantasy world of a mermaid. They are not realistic renderings of what mermaids would be like if they really existed.
These pictures combine mermaids with gods, mythic heroes and fairies. Their lack of photographic detail hints at something beyond the limits of human sight. It is like a piece of advice an artist once gave me: don't paint what you see, paint what you saw. Sometimes after you see something an image lingers in your mind. The image is not a precise photo of what was actually there but an impression of something that was in your own mind. Something meaningful to you. That is what you saw.