Great white sharks invade northern waters off New England and Canada

In recent months, great white sharks have been detected increasingly in the chilly waters off New England and Atlantic Canada. Reports indicate a significant rise in sightings, particularly in Maine, where these apex predators were once seldom encountered. The Maine Department of Marine Resources began monitoring these sharks more closely starting in 2020. Two years into this initiative, researchers recorded 93 white sharks off the coast, with 19 unique individuals identified in 2024 alone, occurring across 47 different sightings. Scientists suggest that the growing number of shark sightings is directly linked to an increase in seal populations, which serve as a primary food source for the sharks. The average residence duration for these sharks in the northern regions has also risen significantly. Reports reveal that white sharks are now lingering longer in areas like New Hampshire and Maine, with a notable increase in sightings even in the Cabot Strait between Nova Scotia and Newfoundland. Despite fears stemming from the film “Jaws,” experts assert that dangerous encounters with white sharks remain exceedingly rare. The first fatal shark attack recorded in Maine occurred in 2020, highlighting the rarity of such incidents. Advances in technology, including the Sharktivity app, have created a platform for individuals to report shark sightings and stay informed about potential shark activity in their areas. This has contributed to broader awareness among beachgoers and fishermen about the presence of these predators in northern waters. Public reactions vary, with some residents expressing acceptance of living alongside these sharks. Fishermen and surfers acknowledge the need to adapt to this new reality while remaining vigilant. The changes in shark behavior, including movement into areas previously not frequented by great whites, indicate a shift in the marine ecosystem. Ongoing monitoring of these sharks' activities is essential for understanding the implications of their presence in northern waters and ensuring public safety.