great white sharks

From great white sharks around Quebec's Îles-de-la-Madeleine to lobsters conquering new territory, oceanographers say the warming of the Gulf of St. Lawrence is having an impact on the creatures that live in its unique ecosystem.

Fred Whoriskey, executive director of the Ocean Tracking Network at Dalhousie University, called the beaching of two of the ocean's apex predators abnormal.

The transmitter attached to the dorsal fin of the shark, who has a Twitter following, had not sent a definitive message for a year and a half.

The great white sharks move torpedo-like through East Coast waters, cruelly efficient hunters with multiple rows of serrated teeth devouring seals and other prey.

The Ocearch research team came to Nova Scotia this fall on a hunch.

Researchers in Massachusetts say white sharks appear to venture offshore farther, with more frequency and at greater depths than previously known in the Atlantic.