For Immediate Release - April 21, 2011

State Officials Continue to Caution Boaters about the Presence of Endangered Right Whales in Massachusetts Coastal Waters

Record numbers discovered in Cape Cod Bay

Click here for photos of right whales

BOSTON - April 20, 2011 - The Massachusetts Department of Fish and Game (DFG) continues to urge boaters to be on the lookout for North Atlantic right whales - an endangered species which have congregated in large numbers in Cape Cod Bay.

On April 19, an aerial survey of the bay and adjacent waters documented approximately 101 individual right whales - a record-breaking number of whales seen in a single day by the Right Whale Conservation Program, a joint project between the Division of Marine Fisheries and the Provincetown Center for Coastal Studies. Marine officials estimate that 50 percent of the known population of North Atlantic right whales has already been spotted this season. Last April, the most right whales seen during a single aerial survey was 70.

Last week DFG's Division of Marine Fisheries issued a high risk advisory due to the number of whales, their behavior, their proximity to shore and the local abundance of zooplankton - tiny marine creatures which makes up the whales' food source. Right whales gather annually in the waters off of Cape Cod to feed.

Right whales are the most endangered large whale in the North Atlantic, with a population of approximately 450 animals. Adult right whales average from 45 to 55 feet in length and can weigh up to seventy tons - the largest measured specimens have been measured at 60 feet long, weighing 117 tons. Females are larger than males.

Right whales engage in surface and subsurface feeding and are often difficult to see, putting them at great risk to be struck by vessels. Vessel strike is a major cause of human-induced mortality for right whales. For the safety of both mariners and whales, vessel operators in the Cape Cod Bay area are strongly urged to proceed with caution, reduce speed (less than 10 knots), and post lookouts to avoid colliding with these highly endangered whales.

Highly concentrated amounts of zooplankton at and just below the surface are driving the whales' behavior. Based on a survey of zooplankton performed on April 14, it is expected that this aggregation of whales will persist for several more days to perhaps a week. DMF will lift the advisory when the right whales depart the area.

Vessels are prohibited by state and federal law from approaching within 500 yards of a right whale. Massachusetts Environmental Police and U.S. Coast Guard are authorized to enforce the 500-yard rule. Vessels that find themselves within 500 yards of a right whale should slowly and cautiously exit the area.

Management of maritime activities near right whales is part of the DMF Right Whale Conservation Program. The Right Whale Conservation Program is a cooperative effort between DMF, the Provincetown Center for Coastal Studies (CCS), and the National Marine Fisheries Service to study and protect right whales in Cape Cod Bay.

Please report all sightings of right whales immediately. Call the NOAA Fisheries Hotline at 866-755-NOAA (or hail the Coast Guard on Channel 16) and for more information, visit the DMF website at