This year, a window into the tropical world seems to have opened off the coast of California. Fishermen and marine life observers are noticing things that used to be seen only far to the south: whale sharks, hammerheads, yellow-bellied sea snakes, and even nests of olive ridley turtles in the sand.
The cause was an unusually strong El Niño, which brought warm waters far to the north. After a prolonged marine heatwave, this phenomenon shifted the usual boundaries of ocean currents. As a result, in September, for the first time in California's history, sea turtle nesting was recorded on the west coast of the United States — two olive ridley nests on the beaches of Orange County.
Among other unexpected visitors were a longfin bigeye fish caught near the pier in Venice and a venomous yellow-bellied sea snake that washed ashore in Orange County. Whale sharks and hammerheads also came closer to shore, delighting whale-watching enthusiasts. Fishermen note an increase in yellowfin tuna catches — from a couple of individuals last year to thousands this season.
However, losses lurk behind the spectacle. Warm waters and storms are destroying kelp forests, altering the familiar ecosystem. Some local species find themselves in constrained conditions, and outsiders can disrupt established food chains. Scientists emphasize that such shifts are a natural part of the El Niño cycle, but their frequency and intensity in recent years raise questions.
For coastal communities, this is both a gift and a warning. Drones and video cameras make these encounters more visible than ever, turning rare events into vivid footage. At the same time, authorities have already declared a state of emergency due to the threat of storms and beach erosion.
According to forecasts, after the cycle ends, conditions in the region will not return to normal until spring. For now, the California coast resembles a living laboratory, where the ocean itself shows how fluid its boundaries are and how closely even the most distant ecosystems are connected.
