Back in the fall of 2014, Hawaiian waters experienced temperatures up to 86°F. This very warm water resulted in a major coral bleaching event statewide. Since that time, water temperatures have been in a more normal range and the coral has stabilized and even shown signs of recovery in places.
In August of this year, the National Oceanic and Atmospheric Administration (NOAA) issued a warning that another major bleaching event was likely to happen this fall. Last month, NOAA reported that bleaching was already occurring. And I’ve noticed that the water does seem warmer, sometimes disturbingly so.
Because of the bleaching threat, I’ve been looking at the coral when I go snorkeling. There are a few very white patches, but by and large it doesn’t look too bad. This patch of purple coral still looked quite healthy and was host to a saddle wrasse (lower photo) and three unidentified fish (above).