Hi, DD!
Santa just told me that it is not too late to add to an Xmas booklist! Think about asking for "Watching Fishes, Understanding Coral Reef Fish Behavior" by Roberta and Jame Q. Wilson. While it does not have nearly as many photos as the wonderful Humann series, it does have extensive text on the growth of coral, fishes adaptation to the reef environment, etc. There is even (blush) sex in the book! How many divers know what zooxanthellae are? Or how vital they are to the growth and sustainablity of the reefs? Read this book and you will!
And what about the "Attack of the Crown of Thorns" in the Southern Hemisphere? Scientists and divers feared that these formidable coral eaters would actually destroy the Great Barrier Reef, the largest reef system in the world. It did not happen, but the saga was intriguing!
Now, if all that does not grab your fins, maybe this will: there is a whole chapter on symbiosis! Wow!
Scorpionfish (Did I mention my picture can be seen on Plate 16?)