St. John: Sea and Sky - Celebrating the Nature of a Small Tropical Island by Caroline S. Rogers, PhD

All of the photographs in this book are from the Caribbean island of St. John, taken by Dr. Caroline Rogers herself while snorkeling. Dr. Rogers captured images of some animals very rarely sighted by those just visiting the islands. 

The book is divided into sections on birds, fishes, corals, sea turtles and octopuses, with a separate chapter on especially unusual fish, urchins and other sea life which are rare and a surprise to encounter. 

Dr. Rogers is a marine ecologist and has spent most of her career here on St. John studying the coral reefs and surrounding seascape.