Fresh out of water

Ondina is a 17 year old girl, but... that's not all she is...She's a mermaid, this is an Atlantic twist on the H2O we all know and love, But... this mermaid is not an island mermaid, nor is she a Mako Mermaid. She is a deep water Mermaid From the Atlantic, North-East of the Coats Of Florida. Ondina is banned from the pod after wandering too close to land on the full moon, she is gifted legs. Ondina tries her hardest to integrate herself with the humans, but there is so much.. in fact too much she doesn't know yet.
While she tries to blend in, it becomes word to Soldiers of the sunken city Atlantis, that the last Deep water mermaid has been found, as if that wasn't enough of a threat- she soon finds out someone may be on to her tail, but who? Will she manage to run from the Atlanteans, keep her mermaid identity secret from land folk? or will she be exposed, or worse? Killed.