The researchers notify Maine Marine Patrol and local municipalities before fishing takes place, he said. Scientists from the Massachusetts Division of Marine Fisheries, the Atlantic White Shark Conservancy, the National Oceanic and Atmospheric Administration, and others have been tagging white sharks for more than a decade. The receivers in Maine detected 19 unique white sharks across 95 dates during the 2025 season, bringing the cumulative number detected in this survey to 105 since 2020. As of last year, approximately 300 white sharks are carrying acoustic tags, the report said. “This trend may indicate a potential difference in residency patterns between white sharks tagged elsewhere and smaller juveniles tagged locally, though further research is required to confirm,” the report said.