Fishing Nets: Types and Materials | Built To Catch

Fishing nets fall into four main types—gillnets, trawls, seines, and dip nets—and nearly all modern versions are built from synthetic fibers like nylon, polyethylene, and polypropylene.

Whether you’re mending gear for your commercial crew or choosing a landing net for an afternoon on the lake, understanding how fishing nets are built matters more than most anglers realize. The wrong mesh or material doesn’t just underperform—it can change exactly what you haul in. Here’s the breakdown of what nets are made from and which design fits which job.

What Are The Main Types Of Fishing Nets?

Commercial and recreational fishing gear splits into several functional families, each engineered for a specific way of capturing fish. NOAA’s gear classification describes gillnets, surrounding nets, seine nets, and trawls as the primary categories, with dip nets and scoop nets serving more specialized roles.

Gillnets are the most distinctive design: a vertical wall of netting that hangs in the water column. Fish swim into it head-first and get caught by the gills when they try to back out. NOAA notes gillnets are typically made of monofilament or multifilament nylon and come in two operational styles:

• Set gillnets are anchored to poles or weights to hold position in one spot.
• Drift gillnets float freely, kept at depth by weights and buoys while moving with the current.

Trawl nets are funnel- or cone-shaped and towed behind a boat, scooping fish as they move through the water. Seine nets are vertical walls with a weighted bottom edge and buoyed top, used to surround schools of fish; beach seines and pole seines are common variations. Dip nets and scoop nets are the simplest—a hoop or mesh basket on a handle, often made with wire, nylon, or cloth mesh, used to lift fish directly from the water.

What Materials Are Modern Fishing Nets Made From?

Nearly all modern nets are synthetic. According to NOAA’s gear materials guidance, the dominant fibers are nylon, polyethylene, polypropylene, and polyester (polyamide), used in two construction styles that anglers frequently confuse.

The distinction between monofilament and multifilament comes down to strand structure. NOAA defines monofilament as a single extruded polymer strand—the clear, stiff line you see on many gillnets. Multifilament is multiple extruded polymer strands braided or twisted together into a softer, more flexible twine, which is common in seine and trawl nets. NOAA’s twinework manual highlights synthetic fibers like polyamide (PA) and polyethylene (PE) mono as key rope materials, with nylon, poly-line, and lead line listed among standard commercial line materials.

Why Does Mesh Size And Rigging Matter So Much?

Gillnets are mesh-size dependent by design. NOAA explains that fish enter by the head and are held by the gills, which means the mesh opening directly controls what gets caught. Too small a mesh and undersized fish get trapped; too large and your target swims straight through. Matching mesh to the species is the single most important design decision for this net type.

Rigging matters just as much as the net itself. For heavy-current or tidal waters, NOAA’s gear guidance notes that heavier lead lines, additional floats, and extra leads are often necessary to keep the net properly positioned. Set gillnets and drift gillnets use entirely different anchoring and buoy systems for this reason—not because one is better, but because each must match its deployment method and water conditions.

One common confusion is treating monofilament and multifilament as interchangeable. They handle differently: monofilament is stiffer and more visible in some conditions, while multifilament is softer, more flexible, and knots differently. Choosing the wrong construction for your target species and water column is a practical mistake that affects catch rates.

How Do I Choose The Right Net?

Match the net to the fishing method, the water column you’re working, and your target species. A beach seine on a sandy shore needs the weighted-bottom, buoyed-top design; a deep-water set gillnet requires monofilament nylon with enough lead line to hold bottom; a landing net for a kayak wants a lightweight hoop design with soft mesh.

When you’re ready to buy, the frame matters as much as the mesh. If you’re shopping for a landing net that will last, an aluminum fishing net roundup with tested options can help you compare durability and weight before you spend.

For commercial-scale questions, NOAA’s published gear descriptions remain the definitive technical reference, covering everything from net construction to the anchoring systems each design requires.