The Neptune Project
The Neptune Project by Polly Holyoke is a story about Nere, a girl who has always felt more comfortable with the dolphins in with the other kids her age. Nere discovers that she has been genetically engineered to survive in the ocean. Her mission is to build a future under the sea safe from the government of the Western Collective. Little does she know the dangers she and the other Neptune kids will encounter on their way to the colony.
Atlantia by Ally Condie
Rio and Bay grew up in Atlantia, a colony deep under the sea. All their lives they had known that one of them could choose to go on land. That one of them was supposed to be Rio. But when Rio's mother is killed and then her sister volunteers to go above she is left with more questions than answers. Can she discover Atlantia's secrets, or will she only be discovered for who she truly is . . . one of Atlantia's most powerful sirens.