This book is the final volume in the Reef ID Books series on the marine life of the tropical Indo- Pacific. Previous volumes of Reef ID Books have been a photo guide to the mostly mobile animals of coral reefs.These were fish, crustaceans, nudibranchs, seashells, echinoderms, marine worms (including flatworms.) This book presents the mostly sessile inhabitants of coral reefs. The reef animals and marine plants considered in this book are grouped into 10 phyla: Corals & allies (Cnidaria), Sea Squirts (Tunicata), Sponges (Porifera), Moss Animals (Bryozoa), Comb Jellies (Ctenophora), Brachiopods, Entoprocts, Foraminiferans, Sea Weeds and Cyanobacteria.The book also provides basic information about jellyfish, presenting the species most commonly found under water. This includes, among others, the extraordinary Immortal Jellyfish and the dangerous Box Jellyfish and Bluebottle.