I just read 2 technical articals that disappointed me because I am going on a cruise and have arranged charters in 5 ports in Dec. The waters have warmed by an El nino that has cuased fairly sever coral bleaching in many arreas of the Caribbean and Bahamas. This bleaching turns the colorful coral a gray/white color and considering the fish get much of their food from the coral they seek the remaining living coral. That is not to say all the coral is bleached, as they say, but it is a problem that basically kills the coral or causes it to go dormant. It then takes a number of years based upon water temperatures to come back to their previoys state. But that time period can be 5-10 years based upon the type of coral. It is most unfortunate for me and others looking forwark to quality snorkeling over the next year. This problem has also affected parts of Asia as well.