Un-man, and other novellas Book

In this novel, a space colony is already decimated from several natural disasters, and now it seems that some kind of viral plague is infecting and changing all the colonists. An outsider scientist, Per, and a young, deaf orphaned girl named Dilani explore the life in the ocean and find that communicating with the planet's sentient sea creatures may be the key to solving the colony's problems. LOVE this book. I really wish Toni Anzetti had written more. I read this twice and am guessing on the earlier read date.