In the sanctuary's northeast corner, Sanctuary Hill rises from 325 feet to 115 feet and is topped with solid granite and piled boulders. Like Jeffreys Ledge, the hills hard substrate is home to a variety of invertebrates and fishes that live on and in the piled boulders. Since Sanctuary Hill is 18 nautical miles offshore, the bedrock outcropping experiences very strong currents. Reportedly, blue and porbeagle sharks visit areas with steeply sloping topography like Sanctuary Hill. For more information on diving in the sanctuary visit: http://stellwagen.noaa.gov/visit/diving/diving.html
Courtesy of NOAA/SBNMS and NURC-UConn.
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