How does Elizabeth Haydon use imagery in The Floating Island?

Examples of Imagery:

"There are creatures in the depths that you could never imagine, and colors you have never seen. Water fairies and nymphs, sea dragons with great hoards of sparkling treasure taken from shipwrecks - there is nothing like the excitement of the carnival that is held on midsummer's day, with the crowning of the sea king and queen and the hippocampus races...."
Chapter 4, pg. 58.

"There are places that are truly dark in the world, Ven, but this place here, this open stretch of sea where you are floating, is not one of them. It's not really dark here - it's just night."
Chapter 21, pg. 237-238.