I just bought this book a few months back. Lots of great pictures. Great Book.
Caribbean Reef Plants (Hardcover)
by Diane Scullion Littler & Mark Masterton Littler
http://www.amazon.com/Caribbean-Plan.../dp/0967890101
Caribbean Reef Plants is an identification guide to approximately 565 marine algae and seagrasses of the Caribbean Region. The 542-page color text is richly illustrated with over 700 underwater photographs and 1,645 line drawings. More than 130 "ecological phenomena" are depicted. The treatment covers the entire Caribbean Region and is indispensable for anyone interested in the study of coral reefs.
542 pages, over 700 color photographs
Publication date: April 2000
OffShore Graphics, Inc.
Hard Cover, ISBN 0-9678901-0-1