Things are getting ‘hot hot hot’ in the Caribbean this summer, but according to a new Coral Reef Watch report, this might not be a good thing.

The National Climatic Data Center said that in June, the world’s ocean surface temperature was the warmest on record.

Coral bleaching is the whitening of coral because of a loss of algae. Under stress, corals may expel their alga which leads to their lighter color, or bleaching. Unhealthy coral can mean unhealthy fish and be dangerous to other sea-life that depends on coral as their habitat and food source.

The reefs in crisis stretch from Nicaragua to Haiti, the Dominican Republic, Puerto Rico and the Antilles.

Scientists say that this may be the worst bleaching since 2005, which was the worst disease year in Caribbean history.

Environmental experts worry that this is another sign of warming oceans across the world, and a big indicator of global warming.

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