The continuation of Mako Mermaids Cam becomes a mermaid and so does Evie's twin brother there's also the problem of the council.

Marina and Luna have saved Merville. Now three years later they need to keep their secret from the human world or bad things could happen. But what happens when a mysterious force is trying to expose their secret to scientist who would do anything to learn about mermaids. Will family even turn against them? (First book is Hunted in the ocean)