On the busy beaches of Southern California, an event occurred that had never been recorded in the entire history of observations: an olive ridley sea turtle (Lepidochelys olivacea) laid its eggs right on the sand near Seal Beach. Three days later, on 19 September, a similar scene was repeated a few miles to the south, near the Huntington Beach Pier. The National Oceanic and Atmospheric Administration (NOAA) officially called this the first documented case of natural nesting by any sea turtle on the west coast of the United States.
Olive ridleys are the smallest of the sea turtles, with adults weighing up to 45 kilograms. They usually nest in the tropical waters of the Pacific, Indian and Atlantic Oceans, mainly off the coasts of Mexico, Nicaragua, Costa Rica and Panama. In California they were sometimes spotted in warm years, when currents carried them farther north than usual, but until now no one had seen them lay eggs here.
Rescuers initially took the turtle for a sick one: it was scrabbling in the sand at night, and people thought it needed help. In fact, it was digging a nest. Both sites were immediately fenced off to protect the clutches from beachgoers and possible tides. Incubation will take 45–60 days, and NOAA specialists together with California authorities will monitor them.
The reasons for such a shift are not yet fully clear, but many link it to the abnormally warm waters brought by a powerful El Niño. Such changes in ocean temperature can expand the ranges of tropical species, forcing them to seek new places to breed. It is not yet clear whether the hatchlings will survive in California's cooler climate and whether they will return here decades later.
For local residents and tourists this came as a real surprise: people come to look at the fenced-off areas, and children call what is happening "magical." At the same time, environmentalists remind us that any interference can destroy the clutch, and ask people not to approach the fences.
This rare event shows how quickly the familiar boundaries of marine animals' habitat are changing under the influence of ocean conditions, and underscores the importance of protecting even those beaches that were previously considered too far north for tropical turtles.
