I highly recommend the “Indo Pacific Coral Finder”. I field tested it this summer in Palawan. It is very accurate and does a great job of covering the major genera and some dominant species. Every dive operation in the Indo-Pacific should have at least one (I could hardly keep it away from the resort staff), and it will help alleviate the ‘overwhelmed head-aches’ experienced by many Caribbean researchers when they first visit these high-diversity areas. It is not as comprehensive as Veron’s encyclopedic “Corals of the World” on which it is based, but is infinitely easier to carry into the field!