In August 2011, scientists conducted a research survey cruise to collect information on the seafloor, sediment and underwater footage of bottom habitat in a historically significant fishing area off the New England Coast known as Jeffreys Ledge.
Jeffreys Ledge is a 33-mile glacial deposit that extends from the coast of Rockport, Massachusetts to just southeast of Cape Elizabeth, Maine. The shallow ledge is surrounded by deeper ocean waters.
Upwelling along the structure helps create a highly productive habitat. Upwelling involves a wind-driven motion, which brings dense, cooler, and usually nutrient-rich water towards the ocean surface.
Jeffreys Ledge supports populations of herring, mackerel, cod, haddock, dogfish, flounder, bluefin tuna, shrimp, lobsters, crabs, scallops, and clams, which come to feed or reproduce.