Healthy coral reefs provide food and a home to about 25% of all the world’s marine creatures, sustain an estimated 6 million fishermen, provide coastal protection by reducing the impact of waves and support local tourist economies. But corals worldwide are under threat. Mass bleaching is rapidly threatening the world’s coral reefs, with an estimated 50% already lost and 90% projected by mid-century.

If you are a certified rebreather diver and you have experienced a caustic cocktail, or have dived with someone who has experienced a caustic cocktail, please participate. You can find the link to the survey in the 'Sources and References' box at the end of this article.