The Mound Builders' Catch: How Mississippian People Fished the Mighty Mississippi

The Mississippi River stretches wide and brown under the late afternoon sun. Along its banks, fishermen wade into the shallows, their woven nets spread wide. Others stand motionless on boulders, wooden spears raised, waiting for the telltale shadow of a passing sturgeon. Behind them, rising from the floodplain like earthen mountains, flat-topped mounds tower against the sky—platforms for the homes of chiefs, for temples, for ceremonies that connect the living to the spirits above.

This is the world of the Mississippian people, and for them, the river was not just a waterway. It was their supermarket.

Between about 800 CE and 1600 CE, the Mississippian people built the most complex societies north of Mexico. They farmed corn and beans, built monumental earthworks, and organized themselves into chiefdoms led by hereditary rulers . But while we often focus on their famous mounds—like Cahokia near modern-day St. Louis or Emerald Mound in Mississippi—we rarely talk about what kept them alive day to day.

And the answer, in large part, was fish.

Let’s wade into the shallows with them and see how they did it.

Why Fish? The Protein Problem

First, a quick lesson in nutrition. The Mississippians were primarily farmers. They grew maize (corn), beans, and squash in the rich, fertile soils along the river’s natural levees . Maize was their staff of life—but here’s the problem.

Corn lacks two critical nutrients: lysine (an essential amino acid) and niacin (a B vitamin). If you eat nothing but corn, you’ll eventually develop pellagra—a disease that causes diarrhea, dementia, and death. Not good.

The solution? Complement corn with beans (which provide lysine) and with fish and meat (which provide both lysine and niacin) . Fish, in particular, became the primary protein source for Mississippian people in many areas. In the American Bottom region (around Cahokia), fish were so important that by the Late Woodland and Emergent Mississippian periods, they were the main source of protein .

And the Mississippi River and its backwaters delivered in abundance.

What Was on the Menu?

So what kind of fish were these ancient anglers catching? Archaeological evidence from sites across the Midwest reveals a diverse menu :

Freshwater drum – a large, silvery fish that makes a distinctive drumming sound
Catfish – channel cats and blue cats, some reaching impressive sizes
Northern pike – a long, toothy predator
Sturgeon – the giants of the river, growing up to eight feet long
Suckers and gar – smaller fish found in backwaters
Bowfin and bullheads – common in sloughs and oxbow lakes

And they didn’t stop at fish. Mississippian people also harvested crayfish and turtles from the same waters . Every available resource was used.

The importance of fish to their diet is so clear that archaeologists can see it in their art. Fish images appear frequently on Mississippian pottery from eastern Arkansas—a clear sign that fishing was not just a subsistence activity but a meaningful part of their culture .

The Tools of the Trade: Nets, Spears, Hooks, and Traps

The Mississippian people were master technologists. They developed a suite of fishing tools that would look familiar to any commercial fisherman today—except everything was made from bone, stone, wood, and plant fibers.

The Fishing Weir: The Smartest Trap Ever Invented

Let’s start with the most impressive technology: the fishing weir. Picture this: two rows of stones, arranged in a V-shape across a river, with the pointed end facing downstream . The water flows freely between the rocks, but fish—swimming with the current—find themselves funneled into an increasingly narrow channel. At the narrow tip of the V, waiting fishermen stand ready with spears.

Brilliant, right?

One of the most famous surviving examples is the Aztalan fishing weir on the Crawfish River in Wisconsin. Built between the 10th and 13th centuries, this stone weir is still visible when water levels are low . The Mississippian people of Aztalan used glacial boulders—left behind by retreating ice sheets 10,000 years earlier—to create their trap. They would stand on the boulders near the opening, spears ready, striking any fish that passed through .

In some cases, they didn’t even need to spear the fish. Large woven baskets could be placed just past the opening. Water flowed through the basket’s weave; fish did not .

The weir system was so effective that similar designs were used across the Southeast. Most weirs were made of wooden poles and pliable green twigs, often woven into cages. Unfortunately, wood rots, so archaeologists rarely find intact examples—but the stone weirs and descriptions from ethnohistorical accounts confirm their widespread use .

Nets and Seines: Harvesting the Schools

Not all fish were caught one at a time. For smaller fish that swam in schools, nets and seines were the most efficient method . Think of a seine as a large net with floats on top and weights on the bottom. You stretch it across a shallow backwater or slough, then drag it toward shore, scooping up everything in its path.

How do we know they used nets? Archaeologists have found netsinkers—small, grooved stones that were tied to the bottom of nets to keep them weighted down . These little stones are scattered across Mississippian sites, silent evidence of large-scale fishing operations.

The nets themselves were made from twisted plant fibers—probably milkweed, dogbane, or nettle fibers. None of these organic nets survive in the archaeological record (they rot too quickly), but the frequency of fish bones at Mississippian sites suggests nets were essential .

Bone Fish Hooks: Intricate and Effective

For more selective fishing—or for catching larger, solitary fish—Mississippian anglers used hooks carved from deer bone. And these were not crude, simple hooks. They required serious skill to manufacture .

Here’s how a Mississippian hook-maker worked:

Select the bone. Deer long bones or toe bones were the preferred material .
Split the bone lengthwise.
Grind it down into a thin, spatula-like shape.
Cut a hole into the end of the spatula.
Expand the hole until the bottom edge became thin enough.
Break off the resulting hook-shaped loop.
Carve the final shape—a longer shank side (with a ridge or eye for attaching line) and a shorter pointed side (carefully sharpened into a barb) .

The final product was small, sharp, and deadly. And it was attached to fishing line made from—you guessed it—twisted plant fibers.

Bone Harpoons and Spears: For the Big Ones

For large fish like sturgeon or gar, spearing was the method of choice. Archaeologists have recovered bone harpoons from Mississippian sites—pointed, barbed tools designed to pierce a fish’s body and hold fast . These were often attached to wooden shafts. A fisherman would stand on a rock or in a canoe, wait for a fish to swim within range, and then thrust.

The harpoon’s barbs prevented the fish from shaking it loose. Once impaled, the fish was unlikely to escape.

Larger fish, like the massive sturgeon that swam the Mississippi, were also taken with these spears. Sturgeon can grow to over 200 pounds—that’s a lot of meat. And a lot of effort to land.

The Landscape: Mounds Rising Nearby

Your prompt mentions “mounds rising nearby.” This detail is historically perfect, because Mississippian villages were almost always located near water—specifically, along major rivers like the Mississippi, Arkansas, and St. Francis.

Most Mississippian farming settlements were located along rivers specifically to take advantage of the high-fertility soils of natural levees. An added benefit? Easy access to fish .

And the mounds? They were the centerpieces of Mississippian towns.

A typical Mississippian town featured :

Square or rectangular houses arranged in orderly patterns
A central plaza for gatherings and ceremonies
Flat-topped earthen mounds—some supporting the chief’s residence, others supporting temples
Sometimes stockades or ditches for defense (and in some cases, the ditches doubled as fish ponds)

In eastern Arkansas, archaeologists identify “St. Francis-type towns”—rectangular in plan, with houses arranged around a plaza, often surrounded by a ditch that served the dual purpose of defense and fish pond .

The mounds themselves varied in height from less than one meter to an astonishing thirteen meters (over 40 feet) tall . At Emerald Mound in Mississippi—the ceremonial center of the region—Native Americans used six million cubic feet of dirt to create the earthworks . Six. Million.

Let that sink in. They moved that much soil by hand, in baskets, without wheels or draft animals.

When Hernando de Soto’s Spanish expedition traveled through Arkansas in 1541, they encountered Mississippian people still living in these mound-centered towns. The Spanish chroniclers noted that chiefs made their homes on top of the mounds .

So when you picture fishermen casting nets or raising spears along the riverbank, just behind them—visible on the skyline—would be those earthen platforms, topped with the houses of their leaders and the temples of their gods.

The Seasonal Rhythm: When and How They Fished

Fishing wasn’t a year-round constant. It followed the rhythms of the river.

Spring floods were the biggest hazard. A late summer flood—like the devastating 1993 flood that modern engineers couldn’t contain—would have been catastrophic for Mississippian people. Floods drowned crops, prevented easy fishing in shallow ponds, and ruined food stored in underground pits . The Mississippi giveth, and the Mississippi taketh away.

But under normal conditions, fishing was most productive in specific seasons and specific habitats.

Archaeologists have identified that Mississippian people exploited a variety of aquatic habitats :

Slow-moving streams
Backwater lakes and sloughs (excellent for net fishing)
Streams with more rapid flow (good for spearing)
Large, deep rivers (where the biggest fish lived)

The backwater lakes and sloughs were particularly important. These shallow, calm waters were perfect for seining. Families could work together—men, women, and even children—to drag a net through the shallows, scooping up hundreds of smaller fish at once.

By contrast, spearing large fish in the main channel was a more solitary, more skilled activity. A single misstep and your prize sturgeon was gone.

Beyond the River: A Complete Subsistence System

Fishing was crucial, but it was part of a larger system.

Mississippian people also :

Grew corn, beans, and squash in gardens on the fertile floodplain
Hunted deer and turkey in the surrounding forests
Gathered wild rice from the lakes (a tradition that continued for centuries—Ojibway people later harvested the same wild rice beds)
Traded fish, hides, copper, marine shell, and other goods along the river

The river was their highway as much as their grocery store. They traveled on the Mississippi to trade high-quality stone and shell with neighboring groups . Intricately carved shell and stone pendants (called gorgets) became symbols of wealth during the Mississippian Period .

But the foundation of it all was the triad of corn, beans, and fish. Corn provided calories. Beans provided the missing amino acid. Fish provided protein and niacin. Together, they sustained populations large enough to build cities—and mounds—that still awe us today.

Comparison with Other Indigenous Fishing Traditions

The Mississippian people were not alone in their reliance on fish. Across North America, Indigenous peoples developed sophisticated fishing technologies.

In the Upper Mississippi region, the Ojibway people later relied heavily on whitefish, salmon trout, muskelunge (which grew to four to six feet long!), and sturgeon . They harvested wild rice from the same lakes where they fished, creating a complete seasonal subsistence cycle.

The fishing weir technology used by the Mississippians was not unique to them. Weirs have been found across the continent, from the Northeast to the Pacific Northwest. But the Mississippian weir at Aztalan is one of the best-preserved examples, and it remains in the Crawfish River to this day .

What the Fish Bones Tell Us

Archaeologists are detectives, and fish bones are their clues.

By analyzing fish remains from Mississippian sites, researchers have learned that:

Fishing became more important over time. In the American Bottom, fish became the primary protein source by the Late Woodland and Emergent Mississippian periods .
They targeted specific habitats. The mix of fish species found at different sites tells archaeologists what kind of water the people were fishing—fast current, slow current, deep river, or shallow slough .
They knew what they were doing. The species present match what you’d expect from experienced, knowledgeable fishermen who understood the river’s ecology.

One study estimated that the deer hunting territories needed to feed a Mississippian town would have to be several orders of magnitude larger than the available wetlands . In other words, there simply weren’t enough deer to go around. Fish filled the gap.

The Decline: What Happened to the Mississippian World?

Around 1600 CE, the Mississippian world began to unravel. The reasons are complex and debated, but they likely include :

Climate change – droughts and floods made farming unreliable
Resource depletion – intensive farming exhausted soils
Warfare – as resources dwindled, competition increased
European contact – de Soto’s expedition brought disease and disruption

By the time European settlers pushed west in the 1700s and 1800s, the great mound cities were abandoned. Their descendants—the modern tribes like the Osage, Quapaw, and Caddo—carried on many traditions, but the era of the great chiefdoms was over.

The mounds remained. The weirs remained. And the river remained, still full of fish.

Lessons from the Mound Builders

What can we learn from the Mississippian fishermen?

First, local knowledge matters. They knew the river—its moods, its habitats, its hidden channels. They knew when and where to fish. That knowledge was passed down for generations.

Second, technology doesn’t have to be complex to be brilliant. A V-shaped pile of rocks—a fishing weir—is about as simple as technology gets. But it’s also brilliant. It uses the fish’s own behavior against it. It’s passive, efficient, and sustainable.

Third, a balanced diet requires diverse sources. The Mississippians didn’t rely on corn alone, or fish alone, or hunting alone. They combined all three. That diversity made them resilient.

Fourth, place matters. Their mounds, their villages, their fishing grounds—all were tied to the river. The Mississippi wasn’t just a backdrop. It was the reason they could build what they built.

Conclusion: The River Gave, and They Received

The image of Mississippian people using nets and spears to catch fish in the Mississippi River, with mounds rising nearby, is not a picture of primitive subsistence. It is a picture of sophisticated engineering, deep ecological knowledge, and sustainable living.

Those fishermen in the shallows were not just catching dinner. They were participating in a system that had fed their people for centuries—a system that allowed them to build cities, raise mounds, and create one of the most complex societies in pre-Columbian North America.

The river gave them fish. The river gave them fertile soil. The river gave them a highway for trade. And in return, they built monuments that still stand—silent testaments to the ingenuity of the people who once cast their nets in these same waters.

Next time you see the Mississippi River—whether you’re crossing a bridge in Memphis, walking a levee in St. Louis, or standing on a bluff in Wisconsin—think of those ancient fishermen. Think of the V-shaped stone weir still submerged in the Crawfish River. Think of the bone fish hooks, the netsinkers, the harpoons.

And think of the mounds rising behind them.

The river is still there. The fish are still there—though not in the same numbers. And if you know where to look, the evidence of those ancient fishermen is still there too, waiting for the water to get low enough, waiting for someone to notice.