Fishing line is the only connection between you and the fish — and most anglers don’t think nearly enough about it. The wrong line for the conditions costs you fish through break-offs, poor bait action, and missed strikes. Here’s a straightforward breakdown of the three main types of fishing line and exactly when to use each one.
The Three Main Types
Monofilament
Monofilament (mono) is a single strand of nylon that has been the standard fishing line for decades. Its properties: moderate stretch (15-25%), good knot strength, floats, and is inexpensive. The stretch is both mono’s biggest advantage and disadvantage.
Use mono for:
- Topwater lures — mono floats, which keeps lures like poppers and walking baits working properly on the surface
- Crankbaits — the stretch acts as a shock absorber, preventing fish from throwing treble hooks during head shakes
- Flounder and crappie fishing — low vis, natural presentation, forgiving for lighter bites
- Leader material in clear water when braid is the main line
Don’t use mono for: Deep jigging, soft plastic fishing, or any technique where feel and sensitivity are critical — the stretch kills bite detection.
Fluorocarbon
Fluorocarbon (fluoro) is virtually invisible underwater — its refractive index is close to water, meaning light passes through it without the angle change that makes mono visible to fish. It also sinks (vs. mono’s float), has less stretch than mono, and is highly abrasion resistant.
Use fluoro for:
- Clear water fishing where fish can see the line — bass, trout, flounder in gin-clear conditions
- Bottom fishing — fluoro sinks and keeps contact with the bottom better than mono
- Leader material — even when using braid as main line, a fluoro leader gives invisibility and abrasion resistance at the business end
- Drop shot, finesse techniques, shaky head — situations where light line and natural presentation are essential
Don’t use fluoro for: Topwater fishing (it sinks and kills lure action), or as cheap main line — quality fluoro is expensive and stiff, making it better suited as leader material than full spool fill on most applications.
Braided Line
Braid is made from woven synthetic fibers (Dyneema, Spectra) and has zero stretch, extreme sensitivity, and a very small diameter for its breaking strength. 30 lb braid is roughly the same diameter as 8 lb mono — meaning you can fit far more line on a reel, and you can feel everything the bait does.
Use braid for:
- Flipping and pitching into heavy cover — zero stretch means instant hook sets through thick vegetation and the diameter/strength ratio lets you horse fish out of grass
- Frog fishing over mats — 50-65 lb braid is mandatory for pulling fish through hydrilla
- Saltwater inshore fishing — braid’s sensitivity lets you feel bottom transitions and subtle bites in current
- Deep jigging — the no-stretch property gives you direct contact with the jig and instant hook sets at depth
- Any application where long casts matter — braid’s thin diameter casts farther than equivalent-strength mono
Don’t use braid without a leader in clear water — braid is highly visible and will cost you bites from wary fish. Always add a fluoro or mono leader when fishing clear conditions.
The Braid + Fluoro Leader Setup
The most versatile inshore and freshwater setup is braid main line with a fluorocarbon leader. You get braid’s sensitivity and casting distance combined with fluoro’s invisibility and abrasion resistance at the hook. Connect them with an Alberto knot or FG knot — both pass through guides cleanly and are extremely strong.
- Inshore saltwater: 20-30 lb braid + 20-25 lb fluoro leader
- Bass (open water): 15-20 lb braid + 12-15 lb fluoro leader
- Bass (heavy cover): 40-50 lb braid, no leader needed
- Crappie/trout: 6-8 lb mono or 6-10 lb fluoro straight through
Match your line to your technique and conditions and you’ll immediately notice the difference in feel, hookups, and landed fish.
Building out your setup? See our picks for the best bass fishing rods and best saltwater spinning reels under $200.