Marina is heartbroken when her dad announces that they will have to leave Mermaid Rock to study walruses in the Artic. But Kai suggests that Marina could stay with his family while her father is in the Artic doing his research, The mermaid friends start planning to train their pets for the big Pet Talent Competition coming up. But when Marina doesn't hear from her father for two days, the friends begin to worry that something must be wrong, and they travel through the magical ocean portal to the Artic seas. It will take all their courage and ingenuity to navigate the dangers of these frigid waters and find Marina's missing father. If their pets have been well-trained, maybe they could help in the search!

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.