San Juan Creek meets the Pacific Ocean at Doheny State Beach in Dana Point, Calif. The poor water quality off Doheny State Beach put in a list of worst beaches in the U.S. Reed Saxon/AP hide caption

itoggle caption Reed Saxon/AP

Which one of these sunscreens would be considered safe and correctly labeled by the Food and Drug Administration? Not a single one. Safe sunscreens are SPF15 or higher, and the new rules require those with broad-spectrum protection to include the term next to and in the same style as the sun protection factor. Benjamin Morris/NPR hide caption

itoggle caption Benjamin Morris/NPR

Susan Backlinie swims as the great white shark rises toward her in publicity art for the 1975 film Jaws. Universal/Michael Ochs Archives/Getty Images hide caption

itoggle caption Universal/Michael Ochs Archives/Getty Images