Coincidentally, I just opened my little mailer from Amazon.com containing my brand new used copy of "Divers and Snorkelers Guide to the Fishes and Sea Life of the Caribbean, Florida, Bahamas and Bermuda" by F. Joseph Stokes, illustrated by Charlotte Stokes.
Being already in possession of Humann and DeLoach, I really wasn't looking for any other sources, but an acquaitance of mine - the local bigwig Ph.D. of our N.O.A.A. installation here on Skidaway Island - told me that his favorite is the aforementioned, even though it has illustrations rather than photos. Seeing as how a used copy, in excellent condition, went for two bucks, I gave it a go.
As I thumb through it, I see that more species of each category of fishie are in there, and many more fishies per page, and it is small and weighs almost nothing, in spite of being hard covered. It has an interesting "notes" section, and the non-fish illustrations on the pages have numbers associated with them that correlate with numbered descriptions in the back of the book.
For a book I'd never heard of, I'm already impressed.
Kevin