Shark Sightings Rise on U.S. Coasts Amid Warming

Shark sightings are increasing across multiple U.S. coastal regions, including Hawaii's North Shore and Massachusetts areas such as Cape Cod, Martha's Vineyard, and Nantucket. Experts link the rise in smooth hammerhead sharks and other warm-water species like blacktip and spinner sharks to warming ocean temperatures making northern waters more suitable for these species. While these sharks are large predators, marine scientists state they are generally not dangerous to humans, though caution is advised. The heightened activity has led officials to issue advisories and post warning signs at beaches, urging the public to remain vigilant and report shark encounters. In California, researchers are still analyzing rare sightings of possibly hybrid 'black mako' sharks, which may have longfin mako traits. These developments reflect shifting marine ecosystems and emphasize the importance of awareness and safety in coastal areas.