Gulf of Maine

Gulf of Maine Map
Gulf of Maine Map. Ed Roworth & Rich Signell, U.S. Geological Survey

The Gulf of Maine is one of the most important marine habitats in the world, and home to a wealth of marine species, from giant blue whales to microscopic plankton.

Quick Facts About the Gulf of Maine:

  • The Gulf of Maine is a semi-enclosed sea that covers 36,000 square miles of ocean, and runs along 7,500 miles of coastline, from Nova ScotiaCanada to Cape Cod, Massachusetts.
  • The Gulf of Maine is bordered by 3 New England states (Massachusetts, New Hampshire, and Maine) and 2 Canadian provinces (New Brunswick and Nova Scotia.)
  • The Gulf of Maine is bounded to the east by 2 underwater banks - Georges Bank, jutting out from Cape Cod, and Browns Bank, off the coast of Canada.
  • Water depths in the Gulf of Maine range from 0 feet to several hundred feet. The deepest spot in the Gulf of Maine is 1,200 feet and is found in Georges Basin.
  • There are many dramatic underwater features in the Gulf of Maine. These features were carved out by glaciers 10,000 to 20,000 years ago.


How the Gulf of Maine Formed:

The Gulf of Maine was once dry land covered by the Laurentide Ice Sheet, which advanced from Canada and covered much of New England and the Gulf of Maine about 20,000 years ago. At this time, sea level was about 300-400 feet below its current level.. The weight of the ice sheet depressed the Earth's crust beneath the Gulf of Maine to below sea level, and as the glacier retreated, the Gulf of Maine filled in with seawater.

Types of Habitat in the Gulf of Maine:

The Gulf of Maine is home to:

  • Sandy banks (such as Stellwagen Bank and Georges Bank)
  • Rocky ledges (such as Jeffreys Ledge)
  • Deeper channels (e.g., the Northeast Channel and Great South Channel)
  • deep basins with water depths over 600 feet (e.g., Jordan, Wilkinson and Georges Basins)
  • Coastal habitats near the shore, which can feature bottoms composed of rocks and boulders, gravel and sand.

    Tides in the Gulf of Maine:

    The Gulf of Maine has some of the greatest tide ranges in the world. In the southern Gulf of Maine, such as around Cape Cod, the range between high tide and low tide may be as low as 4 feet. But the Bay of Fundy has the highest tides in the world - the range between low and high tide can be as much as 50 feet.

    Marine Life in the Gulf of Maine:

    The Gulf of Maine supports over 3,000 species of marine life (click here to see species lists). Types of marine life include:

    Threats to the Gulf of Maine:

    Threats to the Gulf of Maine include overfishing, habitat loss and coastal development.

    Human Uses of the Gulf of Maine:

    The Gulf of Maine is an important area, both historically and currently, for commercial and recreational fishing.

    It is also popular for recreational activities such as boating, wildlife watching (e.g., whale watching), and scuba diving (although the waters are chilly for some!)


    References and Further Information:


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    Your Citation
    Kennedy, Jennifer. "Gulf of Maine." ThoughtCo, Nov. 28, 2015, Kennedy, Jennifer. (2015, November 28). Gulf of Maine. Retrieved from Kennedy, Jennifer. "Gulf of Maine." ThoughtCo. (accessed March 22, 2018).