Grand Banks is an underwater plateau in the Atlantic Ocean southeast of Newfoundland, Canada

Grand Banks is not a place you can visit on foot. It is a submerged continental shelf — a shallow area of ocean floor that extends roughly 280 miles east and south from the Canadian province of Newfoundland. The water above it ranges from about 40 to 300 feet deep, which is shallow enough to support rich marine life but too deep for any land to break the surface.

The Banks sit in the northwestern Atlantic, where the cold Labrador Current meets the warmer Gulf Stream. This collision of water masses creates fog, rough seas, and the conditions that historically made the area one of the world's most productive fishing grounds. The name "Grand Banks" refers to the largest of several underwater plateaus in the region — others include the Tail of the Banks, Flemish Cap, and Scotian Shelf.

Key Takeaways

  • Grand Banks is an underwater plateau in the Atlantic Ocean, located about 280 miles southeast of Newfoundland, Canada.
  • The water depth ranges from roughly 40 to 300 feet, making it shallow enough for abundant fish populations but too deep to see land.
  • The area has been a major fishing ground for centuries, drawing vessels from Europe, North America, and beyond.
  • Today, Grand Banks is managed under international fishing agreements and Canadian jurisdiction, with strict catch limits to protect fish stocks.

Why Grand Banks became famous for fishing

For over 500 years, Grand Banks was the reason fishing fleets crossed the Atlantic. Cod, in particular, thrived in the cold, nutrient-rich waters. European fishermen — Portuguese, Spanish, French, and English — began working the Banks in the 1500s, and by the 1600s, the area was one of the most valuable fishing territories in the world.

The shallow water and the abundance of fish made the work possible with the technology of the time. Fishermen could drop lines or nets and haul in enormous catches. Dried cod became a trade commodity that fed Europe and the Caribbean for centuries. The wealth generated by Grand Banks fishing helped build ports and economies across the Atlantic coast of North America.

The collapse of the cod fishery and what changed

By the 1980s and 1990s, overfishing had depleted the cod population so severely that Canada declared a moratorium — a complete halt to commercial cod fishing on Grand Banks. The ban, which began in 1992, was meant to be temporary, but cod stocks have never fully recovered. Some populations remain closed to fishing today, more than 30 years later.

The moratorium devastated fishing communities in Newfoundland and Labrador, putting thousands of people out of work. It also marked a turning point in how the world understood ocean resources: the idea that a fishery could simply run out, and that industrial-scale harvesting could cause permanent damage. Today, Grand Banks is managed under strict international agreements, with catch limits set by science rather than demand.

How Grand Banks is governed now

Grand Banks straddles Canadian waters and international waters. Canada controls the area within 200 nautical miles of its coast — a zone called the Exclusive Economic Zone. Beyond that boundary, the Banks fall under international law, and fishing is managed by the Northwest Atlantic Fisheries Organization (NAFO), a body made up of countries with fishing interests in the region.

Both Canadian authorities and NAFO set catch limits based on scientific surveys of fish populations. These limits are much lower than they were during the peak fishing years. Fishing vessels must have licenses, and their catches are monitored. The goal is to allow fish stocks to recover while still permitting some fishing activity.

What lives on Grand Banks today

Beyond cod, Grand Banks supports populations of haddock, flounder, redfish, and other groundfish species. The area is also important for marine mammals — seals, whales, and dolphins feed in the waters above the Banks. Seabirds, including puffins and gannets, nest on nearby islands and hunt in the surrounding ocean.

The ecosystem remains fragile. Climate change is warming the Atlantic, which affects which fish species thrive in the region and where they migrate. Some species are moving northward or to deeper water. Scientists continue to monitor the Banks closely to understand how the ecosystem is changing and how fishing rules need to adapt.

How to find Grand Banks on a map

On a map or chart, Grand Banks appears as a large, roughly rectangular area of shallow water southeast of Newfoundland. The nearest major city is St. John's, Newfoundland, which sits on the coast about 250 miles to the northwest. The Banks extend from roughly 42° to 47° North latitude and 47° to 56° West longitude.

If you are looking at a nautical chart or a detailed map of the Atlantic, Grand Banks will be labeled, and the water depth will be marked in fathoms or meters. The area is crossed by shipping lanes, and modern fishing vessels use GPS to navigate to specific coordinates. The fog that rolls in regularly makes navigation challenging even with modern technology.

Frequently Asked Questions

Can you visit Grand Banks or walk on it?

No. Grand Banks is underwater, with water depths ranging from 40 to 300 feet. You can only see it on a map or visit it by boat, and even then you would see only water and sky — the Banks themselves remain below the surface.

Why is Grand Banks so foggy?

The cold Labrador Current and the warm Gulf Stream meet over Grand Banks, creating a temperature difference that causes water to evaporate and form fog. This fog is famous among sailors and has caused countless shipwrecks over the centuries.

Are there still fish on Grand Banks?

Yes, but in much smaller numbers than historically. Cod populations remain depleted, but other species like haddock and flounder are fished under strict catch limits. Scientists monitor the area constantly to track recovery and adjust fishing rules.

Who owns Grand Banks?

Canada controls the area within 200 nautical miles of its coast. Beyond that, the Banks fall under international waters managed by NAFO, an organization of countries with fishing interests in the region. No single country owns the outer Banks.