After making a potentially huge discovery, a mostly dolphin-crewed spaceship hides from a galaxy of aliens inside a planet's ocean, where they deal with stress-induced mutiny. more than just the human race.

Really good, especially from a new (to me) author. I loved the interactions; it was a really character-oriented story. New concept, "uplifting" dolphins and chimps, among other aliens, and it seemed believable. There were some unexplained points, but I think they will wait for the second book.