Coralie is organizing a play with her mermaid friends, but they can't decide on a topic for their play. They have the idea to do some research about humans and get some ideas for their play, so they travel to the Red Sea to investigate an old shipwreck. They find human utensils, tools, and plates. They even discover an old bathtub and wonder what humans could use it for. However, there are many dangers in the Red Sea. There are angry sharks, and aggressive fish protecting their nests. But the greatest danger of all comes from the humans themselves. Coralie wonders if all humans are evil, polluting the ocean, or if some humans might be good people, helping to preserve and protect the ocean.

I loved this cute book! The mermaid culture is wonderfully imaginative, and I thought it was so fun to learn about all the mermaid friends. We also get some real life facts about interesting fish and conservation in the ocean. The plot and mysterious adventure had me guessing and wondering!

I love all the interesting mermaid characters. They all have their own strengths and that is what makes them such a great team. Coralie is funny and smart and strong. Naya is always inventing some type of new scientific magical combination to help them in their adventures. Luna has a special connection to marine animals. Kai is always looking for a new way to do things, a new approach to their problems. And Marina is the heart of the group, and she is always encouraging and supporting the others.

The black and white illustrations in this book are so cool! It really brings the story to life. I love the art style, and the unique designs for each mermaid character.

Disclaimer: I received a copy of this book from the publisher in exchange for a free and honest review. All the opinions stated here are my own true thoughts, and are not influenced by anyone.