Surf, sun, sand and scales?

A book about a completely utterly normal girl. Totally boring. Or so she thought. Aqua (ac-wa) is a 13 year old who was found on Deliah Beach, alone at 5:00am on a Sunday morning. She is normal apart from a small phobia of water. She has lived at an Miss Brianna's Academy for Orphaned Girls all her life and knows no different. Until one day. With dropping grades in PE due to u participation thanks to her severe asthma, she is forced to join the swim team in a last attempt to up her grades before she is expelled and left to fend for herself. All goes well until the State Ocean Swimathon.