Reefsong — Carol Severance

After narrowly escaping death in a forest fire, Angie Dinsman found herself under the control of the World Life Company. They promptly equipped her with webbed hands and gills—creating a half‑fish, half‑woman. Her mission is to uncover secret research files on the water world of Lesaat. But first she has to undergo the terrifying process of learning to breathe underwater. After mastering the basics of survival, she faces an insurmountable challenge: finding the information that could end starvation on Earth while sabotaging the company's evil plans.