This rare coral has unknown population figures .
The population is considered to be decreasing ; the species is likely to be threatened by the global reduction of coral reefs , the increase of temperature causing coral bleaching , climate change , human activity , parasites , and disease .
This rare coral has unknown population figures but the population is considered to be decreasing ; the species is likely to be threatened by the global reduction of coral reefs , the increase of temperature causing coral bleaching , climate change , human activity , parasites , and disease .