Thursday, 02 June 2022 05:52

How sunscreen hurts corals

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How sunscreen hurts corals Image credits: Save the Reef

While we've known for a while that oxybenzone, an ingredient in sunscreen, can damage and kill coral reefs, the exact mechanism was unknown. A study in Science has now found that oxybenzone only kills sea anemones and mushroom corals when they’re exposed to sunlight. When the corals are exposed to both oxybenzone and UV light, they metabolize the chemical in a way that turns it into a "potent photosensitizer." This causes damaging radicals to form, which are toxic to the animals. It was also found that the coral’s symbiotic algae absorb the toxins produced by the metabolized oxybenzone and protects the coral. This means that corals that are already bleached and therefore lack the algae, may be even more vulnerable to sunscreen damage. Read more: https://www.science.org/doi/10.1126/science.abn2600

Read 726 times Last modified on Thursday, 02 June 2022 06:14