In the Darlington Rogue, Nara and Tom Latimer spawned male/female twins. The female dies shortly after hatching. In Global Warming, their hybrid male child, Pisces, grows to maturity and impregnates his fiancée, Jean. Unknowingly, she carries twin females who are water-breathing humans that will mature rapidly and bear other hybrids. The twins are born in human childbirth. The human population is to become both water and air-breathing creatures that will survive global warming and the melting of the polar caps that will flood the world. Hybrid twins, Acquabelle and Hydra, are the key to the success in Dr. Wild's Conch Conversion.