The influx of marine species poses risks to beachgoers and marine ecosystems. Juvenile white sharks, while not typically aggressive, are appearing in greater numbers, potentially increasing encounters with humans. Stingrays, which thrive in warmer waters, are also expected to proliferate, leading to a predicted rise in stingray injuries. California lifeguards already treat approximately 10,000 stingray injuries annually, a number expected to increase significantly this summer. Additionally, the arrival of venomous yellow-bellied sea snakes, which are rare in California, could pose a hazard to those unaware of their danger. The disruption of marine food chains may also have long-term ecological consequences.