Reef-Friendly Sunscreen

Reef-friendly sunscreen is sun protection formulated without the UV-filter chemicals shown to harm corals, principally oxybenzone (benzophenone-3) and octinoxate, which cause coral bleaching, larval deformity, and DNA damage at low concentrations. Reef-friendly products rely on mineral filters, non-nano zinc oxide and titanium dioxide, that sit on the skin rather than dissolving into the water. The labeling has no universal legal definition, but regulation is concrete: Hawaii’s Act 104 banned the sale of oxybenzone- and octinoxate-containing sunscreens from January 1, 2021, Palau’s 2020 law banned ten reef-toxic ingredients, and several other jurisdictions have followed. Claims of being reef-safe remain unverified by any single standard.