This is the fifth book of this series. Mermaid Cassandra is Mermaid Annabella's mom. She's painting her a special picture but needs to add more color to it.
Publishing Push and the author shared this series with me so I could review it for you (thanks). It has been published so you can get a copy now.
She finds some bioluminescent creatures. That would be a nice addition. But a giant squid wants to take them!
There is a quick quiz at the end to help your child remember what they learned.