Scientists link expanded shark sightings in some New England waters to increased availability of the seals that the sharks hunt.

Rick Clough spent some four decades fishing for lobsters and sea urchins off the Maine coast before spotting one of the ocean's most recognized predators — a great white shark.

Officials in Scarborough informed the public of a "potential shark sighting in local waters, specifically in the area off the south tip of Richmond Island, Crescent Beach State Park, Higgins Beach and Pine Point Beach" located along the Maine coast. All beaches are within a half-hour's drive of Portland.