A typical view across a shallow (5-m depth) fringing reef community in Great Lameshur Bay, St. John (US Virgin Islands), where the growth and success of juvenile corals was measured over a decade and tested for a relationship with seawater temperature. A small, numbered aluminum tag can be seen in the centre foreground, where it is glued to the igneous reef substratum to permanently mark a juvenile colony of Porites (left of tag); hundreds of such tags were used to mark juvenile corals every year between 1996 and 2005 in order to measure inter-annual variation in their success.