Kaneohe Bay experiences pCO2 levels above atmospheric average, varying between 400-500 µatm during normal conditions (Fagan and Mackenzie, 2007). Temperatures in Kaneohe Bay normally range from…. At the time of collection of corals for this study, Kaneohe Bay was experiencing a high temperature event, and temperatures had reached 30℃ a month prior to collection (Figure 1). Corals were taken from within a few metres of horizontal distance of the east-facing reef crest of Hawaii Institute of Marine Biology Marine Refuge. This crest is dominated by xxx species, which are typically of a compacted growth form on the crest. P. damicornis is typically found growing on the walls of small hollows in the reef crest. Low tide usually reaches 1 feet of the reef crest, and the crest experiences exposure at extreme low tides. Light levels reach xxx during the day in Kaneohe Bay.