Think of more than your skin when applying SPF

Choose mineral-based, reef-safe sunscreen.

Find the right sunscreen for you and coral reefs, and some other tips for protecting your skin.

Exposure to ultraviolet (UV) radiation increases the risk of skin cancer, photoaging, and immune suppression. Sunscreen, protective clothing, and shade are essential for safeguarding skin health. However, many conventional sunscreens contain chemical filters harmful to marine ecosystems — especially coral reefs. Explore how to both protect our skin and preserve coral reefs through mindful, effective sun practices.

Choose broad-spectrum, reef-safe sunscreen

Mineral-based sunscreens containing non-nano zinc oxide or titanium dioxide offer broad-spectrum (UVA and UVB) protection and are recognized as Generally Recognized as Safe and Effective (GRASE) by the FDA as of 2021. [1] In contrast, common chemical filters such as oxybenzone (benzophenone-3), octinoxate, and avobenzone have been shown—even at low concentrations — to cause coral bleaching, larval deformities, and DNA damage in coral planulae. [2]
Pro tip: make sure you reapply every two or so hours, depending on the sunscreen, especially after you towel off!

Other tips: wear UPF clothing and practice reef-conscious habits

UPF (Ultaviolet Protective Factor) clothing, wide-brimmed hats, and UV-blocking sunglasses provide physical barriers that reduce reliance on sunscreen. Modern sun-protective apparel is lightweight, breathable, and rated for sun exposure. This approach also minimizes chemical sunscreen use, easing pressure on sensitive marine habitats — especially in coastal or reef-rich areas.

General habits you can start doing to help coral reefs include applying sunscreen at least 15 minutes before entering water to allow absorption and reduce wash-off, rinsing off excess sunscreen before reef exposure (e.g., rinse in shower, not in ocean) and supporting reef-safe regulations. Some places like Hawaii, Palau, and Mexican marine parks have prohibited oxybenzone/octinoxate–based sunscreens to protect coral ecosystems. Lastly, when you can, reduce other pollutants. Coral reefs are stressed by sewage, plastics, warming, and acids. Personal actions like using reef-safe personal-care products and reducing single-use plastic waste further help maintain reef resilience.

The Bottom Line

Mineral sunscreen, UPF clothing, and being reef-conscious is the way to go

You can protect your skin effectively and preserve coral reefs by using broad-spectrum mineral sunscreens (non-nano zinc oxide or titanium dioxide), wearing UPF clothing, hats, and sunglasses for extra protection, and practicing reef-conscious sunscreen application and supporting environmental regulations. All it takes is a few smart choices to enjoy the sun and the sea responsibly.

Sources

  1. Downs, C.A., Kramarsky-Winter, E., Segal, R. et al. Toxicopathological Effects of the Sunscreen UV Filter, Oxybenzone (Benzophenone-3), on Coral Planulae and Cultured Primary Cells and Its Environmental Contamination in Hawaii and the U.S. Virgin Islands. Arch Environ Contam Toxicol 70, 265–288 (2016). https://doi.org/10.1007/s00244-015-0227-7
  2. Wagner, Laura. “Chemicals In Sunscreen Are Harming Coral Reefs, Says New Study.” NPR, 20 October 2015. https://www.npr.org/sections/thetwo-way/2015/10/20/450276158/chemicals-in-sunscreen-are-harming-coral-reefs-says-new-study
  3. NOAA (Updated June 20, 2024). Skincare Chemicals and Coral Reefs. National Oceanic and Atmospheric Administration. Available at: oceanservice.noaa.gov/news/sunscreen-corals.html