The Grand Banks sit in the Atlantic Ocean off the coast of Newfoundland and Labrador, Canada

The Grand Banks are a series of underwater plateaus — broad, shallow areas of the ocean floor — located roughly 250 kilometers (155 miles) southeast of Newfoundland. They sit where the continental shelf drops away into deeper ocean, making them one of the most productive fishing grounds in the world. The Banks span an area larger than the province of Newfoundland itself, stretching across thousands of square kilometers.

The name "Grand Banks" refers to several distinct underwater features, with the main Grand Bank being the largest. Other nearby banks include the Northeast Peak, the Southeast Peak, and smaller formations like the Tail of the Bank. All of these sit within Canada's exclusive economic zone, the area where Canada has the right to manage fishing and other ocean resources.

The Banks are not islands or shallow reefs you can see from the surface. They are underwater plateaus where the water depth ranges from about 40 to 100 meters (130 to 330 feet), much shallower than the open Atlantic Ocean around them. This shallow water, combined with the mixing of cold Arctic currents and warmer Gulf Stream waters, creates conditions that support enormous populations of fish.

Key Takeaways

  • The Grand Banks are underwater plateaus located southeast of Newfoundland, Canada, in the Atlantic Ocean.
  • The Banks are famous as one of the world's richest fishing grounds, historically supporting cod fisheries that shaped North American settlement.
  • The shallow water and meeting of different ocean currents create ideal conditions for fish to feed and grow.
  • The Banks are part of Canada's exclusive economic zone, meaning Canada controls fishing rights in the area.

Why the Grand Banks became famous for fishing

For centuries, the Grand Banks were known as one of the most abundant fishing grounds on Earth. European fishermen, particularly from England, France, Spain, and Portugal, traveled to the Banks starting in the 1500s to catch cod. The fish were so plentiful that early accounts describe nets being lowered and coming up full without much effort.

Cod from the Grand Banks became a major trade commodity. The fish were salted and dried on shore, then shipped back to Europe and the Caribbean. This trade was so valuable that control of the Banks became a point of conflict between European powers for over 200 years. The abundance of cod also drew settlers to Newfoundland, making the fishery the foundation of the region's economy.

The fishing pressure on the Banks increased dramatically in the 1900s, especially after World War II, when industrial fishing vessels with advanced technology arrived. By the 1980s, the cod population had collapsed from overfishing. In 1992, Canada closed the cod fishery on the Grand Banks entirely to allow the population to recover. The fishery remains closed today, though other species like snow crab and shrimp are now harvested there.

The geography and ocean conditions that make the Banks productive

The Grand Banks exist because of the way the North American continent's edge is shaped. The continental shelf extends outward from Newfoundland like a broad underwater plateau before dropping steeply into the deep Atlantic. The Banks are the shallowest and most prominent parts of this shelf.

The shallow water over the Banks means sunlight reaches the ocean floor, allowing algae and other plants to grow. These plants form the base of the food chain, supporting small fish and other creatures that larger fish eat. The shallow water also warms more easily than deep ocean, creating conditions where fish can thrive.

The Banks are also where two major ocean currents meet. The cold Labrador Current flows south from the Arctic, while the warm Gulf Stream flows north from the Caribbean. Where these currents collide over the Banks, they mix and create upwelling — water from deeper in the ocean rises to the surface, bringing nutrients that feed the entire ecosystem. This combination of shallow water, sunlight, and nutrient-rich currents made the Banks one of the most productive fishing grounds in the world.

How to locate the Grand Banks on a map

If you are looking at a map of eastern Canada, find Newfoundland and Labrador on the Atlantic coast. The Grand Banks lie directly offshore to the southeast. The nearest city on land is St. John's, Newfoundland, which sits on the eastern tip of the province.

On a detailed map, the Banks appear as a large, shallow area marked with depth contours. The main Grand Bank is roughly rectangular, stretching about 280 kilometers (175 miles) from north to south and about 240 kilometers (150 miles) from east to west. The water depth over most of the Banks ranges from 40 to 100 meters, which appears as a lighter shade on bathymetric maps (maps that show ocean floor depth).

The Banks are located at approximately 43 to 47 degrees north latitude and 52 to 56 degrees west longitude. They sit entirely within Canada's exclusive economic zone, which extends 200 nautical miles from the Canadian coast. The nearest point on the Banks is about 250 kilometers from the Newfoundland shore, putting them well beyond sight of land.

The difference between the Grand Banks and other fishing grounds

The Grand Banks are not the only productive fishing area in the Atlantic, but they are distinctive because of their size and the specific conditions that make them so rich. Other well-known fishing grounds include the Georges Bank (off Massachusetts), the Dogger Bank (in the North Sea), and various banks off Europe. Each of these areas sits on a continental shelf where shallow water meets nutrient-rich currents.

What made the Grand Banks unique historically was the sheer abundance of cod. The Banks supported a fishery that lasted for over 400 years without significant decline until industrial fishing arrived. The combination of ideal water conditions, the size of the area, and the migration patterns of Atlantic cod created a fishery unlike any other in the world.

Today, the Grand Banks still support fishing, but for different species. Snow crab and shrimp thrive in the cold water where cod once dominated. The ecosystem has shifted, but the Banks remain one of Canada's most important fishing regions. The closure of the cod fishery and the shift to other species represent one of the largest changes in North Atlantic fishing in recorded history.

The impact of the Grand Banks on Newfoundland and Canadian history

The Grand Banks shaped the settlement and development of Newfoundland and eastern Canada more than any other single resource. The cod fishery drew European settlers to the region starting in the 1500s, long before permanent colonies were established. Fishing villages grew up along the Newfoundland coast specifically to process and ship cod from the Banks.

For over 400 years, the Banks were the economic engine of Newfoundland. Families built their lives around the fishing season. The wealth generated by the cod trade funded schools, churches, and infrastructure across the province. The fishery was so central to Newfoundland's identity that the province's economy, culture, and politics all revolved around it.

The collapse of the cod fishery in 1992 was a catastrophic event for Newfoundland. Thousands of people lost their jobs, and entire communities that had depended on fishing for centuries faced economic crisis. The closure forced the province to diversify its economy and seek new sources of income. Today, oil production and tourism have become important, but the Grand Banks remain a symbol of both Newfoundland's rich history and the dangers of overfishing.

Frequently Asked Questions

Can you visit the Grand Banks?

The Grand Banks are underwater and located far from shore, so you cannot visit them the way you would visit a land-based location. However, fishing vessels and research ships regularly work in the area. Some tour operators in Newfoundland offer boat trips that pass near the Banks, though you will not see them — they are beneath the water's surface.

Are there still fish on the Grand Banks?

Yes, but the species have changed. Atlantic cod, which once dominated the Banks, remain depleted and the fishery is closed. Snow crab, shrimp, and other cold-water species are now harvested there. The ecosystem has shifted, but the Banks continue to support commercial fishing operations.

Why is the cod fishery still closed after 30 years?

The cod population has not recovered to levels that would support a commercial fishery. Scientists monitor the population regularly, and the closure remains in place because the stocks are still too low. Recovery from such severe overfishing takes decades, and the cod population on the Grand Banks has not shown the growth needed to reopen the fishery.

What countries fish on the Grand Banks?

Canada controls the Grand Banks within its exclusive economic zone and manages the fishery there. However, other countries have historical fishing rights in international waters beyond Canada's zone. Spain, Portugal, and other nations have negotiated agreements to fish in certain areas near the Banks, though the richest parts of the Banks are under Canadian control.