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The Complete Saltwater Fishing Line Guide Everything you need to know, to set up and fish the right Shimano line for every saltwater situation.

Saltwater is the toughest test a fishing line will ever face. Salt, sand, sharp rocks, mussel beds, hard tides and fish that pull far harder than anything in freshwater all work against you at once. Whether you are flicking a small lure for bass off the rocks, dropping a jig to a wreck full of pollack and cod, or hanging on to a stick bait as a tuna crashes it on the surface, your line is the one thing connecting you to the fish. The right line lets you feel every take, set the hook and land more fish, cast after cast and trip after trip.

 

This guide walks you through everything you need to know about saltwater fishing lines. From the three line types and how they behave in the sea, to the best Shimano setup for every common European saltwater situation, the full Shimano and PowerPro saltwater line range, leader choices, a comparison chart and the questions every sea angler asks.

What types of fishing lines are there?

What types of fishing lines are there and when do you use each?

 

Saltwater fishing uses three main types of fishing line: braid, monofilament and fluorocarbon. Each one behaves differently in the sea, and most sea anglers use all three across different situations. Below we introduce each type before diving into when and how to use them.

What is braided line?

Braided line is woven from multiple polyethylene (PE) fibres into one thin, incredibly strong line with almost zero stretch. That combination is made for saltwater. The thin diameter cuts through wind and tide, casts a long way and gets your lure or rig down quickly in current. The lack of stretch puts you in direct contact with everything at the end of your line, so you feel the jig touch down on a wreck, the rattle of a take in deep water and the lightest pluck of a bass on a small lure, and you can set the hook instantly even at long range or in a strong tide.

 

Braid is your go-to choice for: shore and boat lure fishing, vertical and slow jigging, popping and stick baiting for big game, deep water bottom fishing where you need to feel the bottom, and any situation where casting distance and sensitivity matter. Because braid has almost no stretch and is the part of the setup the fish inspects up close, it always needs a mono or fluorocarbon leader between the mainline and the lure or rig.

What is the difference between 4, 8 and 17 braid?

 

In saltwater the braid of choice is usually an 8 strand construction, with a tougher 4 strand option for value and rough ground, a sinking braid for depth and current, and a 17 strand construction for the heaviest big game. You will see this on the spool as 4, 8, 8+ and V2, as G5 for the sinking braid, and as 17+ on the big game line. Each construction has a saltwater job where it shines.

An 8 strand braid is woven from eight fine strands compressed into a round, smooth, thin profile. It casts a long way, cuts through wind and tide, runs quietly through the guides and is highly sensitive for its diameter. For shore lure fishing, jigging and almost all saltwater situations, an 8 strand braid such as Shimano Kairiki 8 or Ocea Braid is the standard choice.

A 4 strand braid such as Shimano Kairiki 4 is woven from four strands for a slightly more textured, hard wearing profile and excellent value. In the sea it is a dependable choice around rough ground, mussel beds and wrecks where abrasion is the main threat.

A sinking braid such as Shimano Kairiki G5 carries an extra high density core so it sinks and cuts below the surface tow. In the sea it keeps you in contact with a jig or bait in deep water and strong tide, where a floating braid would bow in the current.

Premium 8 strand braids such as Kairiki 8+, Shimano Ocea Braid and PowerPro Super 8 Slick V2 add an advanced coating and an even tighter, more stable weave for the smoothest casting, longest life and the best resistance to the wear that salt, sand and guides inflict on a line. They are the choice for serious saltwater anglers who want the very best long term performance.

For vertical and deep jigging, many braids are offered in a multi-colour version that changes colour at set intervals, so you always know exactly how deep your jig is. Shimano Kairiki 8 multi-colour and Ocea Braid are ideal for reading the water column and keeping your jig in the strike zone in deep water and strong tide.

For offshore big game, the Shimano Ocea 17+ takes braid to another level with a 17 strand construction: 16 IZANAS SF700 fibres wrapped around a central SF600 core. The core keeps the line round and stops it going flat and twisting under heavy load, for long casting, no wind knots and total reliability on tuna, amberjack and the hardest fighting fish.

What is monofilament line?

Monofilament is a single strand of nylon that stretches under pressure. In saltwater that stretch is exactly what makes mono valuable in the right place. It absorbs the shock of a heavy cast, cushions sudden lunges from big fish and forgives mistakes, which is why it is the backbone of surfcasting and a favourite for anglers who want a simple, forgiving setup. Mono is easy to handle, knots easily, is naturally abrasion resistant and floats better than the other line types.

 

Monofilament is your best choice for: surfcasting and beach fishing, shock leaders for casting heavy leads, bottom and bait fishing where stretch protects the hook hold, and anglers new to sea fishing who want a forgiving, easy to manage line.

What is fluorocarbon line?

Fluorocarbon is almost invisible underwater. It bends light in nearly the same way as water itself, which means fish in clear, pressured saltwater look right past it. It is denser than mono so it sinks fast, and it is impressively abrasion resistant against rock, sand and the sharp gill plates and teeth of saltwater species. In the sea it is used mainly as a leader rather than a full mainline.

 

Fluorocarbon is your best choice for: leaders between a braid mainline and your lure or rig, clear and pressured water where stealth matters, fishing around rock and structure where abrasion resistance counts, and finesse presentations such as light rock fishing where the lure needs to look natural.

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What is the best shimano fishing line for each saltwater technique?

 

Saltwater fishing is not one technique, it is many. The line you flick a small lure with off the rocks is not the line you drop to a deep wreck, and neither is the line you cast a heavy lead with into the surf. Below you find the best Shimano setup for the main saltwater situations you can fish in Europe, in the order most sea anglers meet them. Each block tells you the mainline to choose, the diameter, the right leader and why that setup works.

Casting lures from rocks, beaches and piers for bass, pollack, mackerel and garfish is all about distance, feel and a setup that stays reliable when a fish hits hard and dives for cover.

Mainline:

A braided mainline is the go to for shore lure fishing, giving you long casts and direct contact with the lure. A smooth 8 strand braid like Shimano Kairiki 8 is a superb all round choice. For maximum casting distance and the smoothest feel, premium braids like Kairiki 8+ or PowerPro Super 8 Slick V2 are worth considering.

Diameter:

Most shore lure fishing is done with braid in the 0.13mm to 0.19mm range (around 18lb to 26lb), depending on the size of fish and how snaggy the ground is.

Leader:

A fluorocarbon leader such as Shimano Ocea EX Fluoro Leader or Yasei Fluoro Leader is essential. Diameters around 0.30mm to 0.40mm (roughly 16lb to 25lb) give a near invisible presentation while protecting against rock, sand and a bass's raspy mouth. A leader of around 1m to 2m works well, short enough that the knot stays in front of the tip ring on most casts.

Why this setup works:

Thin braid casts a long way and transmits every knock instantly, while the fluorocarbon leader adds stealth, resistance to abrasion and the strength to turn a fish away from the rocks. It is the most versatile saltwater lure setup there is.

Jigging a wreck, reef or sandbank from a boat for cod, pollack and coalfish means working a lure straight up and down, often in deep water and strong tide. Feeling the bottom and the take, and knowing your depth, is everything.

Mainline:

A braided mainline is the only real choice here for its thin diameter and zero stretch. Shimano Kairiki 8 in a multi-colour version lets you read your exact depth, and the sinking Kairiki G5 cuts through the tide to keep you in contact in deep water. For the toughest wreck work and deep, strong tide, the heavier Shimano Ocea Braid delivers extra strength and abrasion resistance.

Diameter:

Inshore boat and vertical jigging is typically done with braid in the 0.19mm to 0.28mm range (around PE 1.2 to PE 3), depending on depth, tide and the size of the jigs and fish.

Leader:

A fluorocarbon leader such as Ocea EX Fluoro Leader in 0.40mm to 0.60mm (around 30lb to 50lb) protects against the wreck and the rough ground while staying low in visibility. A leader of roughly 2m to 3m is normal for jigging.

Why this setup works:

Thin, multi-colour braid gets your jig down fast, holds it in the strike zone in heavy tide and tells you the instant a fish takes on the drop. The heavier fluorocarbon leader then handles the abrasion and shock of fish diving back into structure.

Around the Mediterranean and Atlantic, casting big stick baits and poppers or working speed and slow jigs for amberjack, tuna, bonito and bluefish is saltwater fishing at its most extreme. Long fights, blistering runs and constant contact with reef and wreck demand the strongest possible setup.

Mainline:

This is where Shimano's premium saltwater braids earn their place. The Shimano Ocea 17+ (17 strand) and Ocea Braid (8 strand) are built for exactly this, with a Japanese construction, Heat Sink Coating and IZANAS fibre for maximum strength, smooth long casting and the durability to survive hard drag pressure and big fish.

Diameter:

Heavy jigging and popping is fished with braid roughly from PE 3 up to PE 8 and beyond (around 0.28mm to 0.47mm and heavier), matched to the size of the fish and the class of tackle.

Leader:

A heavy fluorocarbon leader such as Ocea EX Fluoro Leader is essential, commonly used from around 0.70mm up to 1.00mm and beyond (roughly 50lb to 130lb), to handle reef, gill plates and the sustained pressure of a big fish. A leader of around 2m to 4m is common. Heavy monofilament can also be used as a more forgiving shock leader for surface work.

Why this setup works:

A super strong, low stretch braid gives you the casting distance, hook setting power and direct control needed to stop a powerful fish, while a thick, abrasion resistant leader takes the punishment of structure and a hard fighting fish so the connection holds when everything is loaded up.

Trolling lures or baits behind a moving boat for tuna, marlin and other big game is a major saltwater discipline in the Mediterranean and Atlantic. It puts huge, sustained loads on the line and the drag, so strength and heat resistance come first.

Mainline:

Trolling is traditionally done with a heavy, stretchy monofilament that cushions the strike. Shimano Tiagra Hyper Trolling, also offered in an IGFA rated version, is engineered for exactly this. Where a thin, low stretch line is preferred for depth and contact, a braid such as the Shimano Ocea 17+ provides the strength and reliability for the biggest fish.

Diameter:

Trolling line is chosen by breaking strain and line class rather than diameter, with monofilament commonly run from around 0.70mm and up for the heaviest classes, matched to the tackle and the target.

Leader:

A heavy monofilament or fluorocarbon leader, or a wire trace for toothy species, connects the mainline to the lure or bait. Heavy Ocea EX Fluoro Leader is a strong choice where low visibility and abrasion resistance matter.

Why this setup works:

The stretch of a trolling mono absorbs the violent strike of a fast fish hitting a lure at speed, while a heavy leader handles the abrasion and shock of a long fight. A low stretch braid is the alternative when you need to run lures deep and stay in direct contact.

Surfcasting and beach fishing means casting heavy leads a long way and waiting on a bite for bass, flatfish, rays, cod and whiting. The forces of a full power cast with a heavy lead are huge, so a shock leader is non negotiable here.

Mainline:

A dedicated surf mono is the classic choice. Shimano Speedmaster Surf casts a long way and forgives a lot, and the Speedmaster Surf Tapered version has a built-in shock leader taper so it is ready to cast heavy leads straight off the spool. A low stretch Technium is another strong surf mainline, and a budget Catana suits anglers starting out. For maximum distance a thin braid can be used instead, always behind a mono or fluorocarbon shock leader.

Diameter:

Mono mainlines are typically fished in the 0.30mm to 0.35mm range, with a tapered shock leader rising to around 0.57mm. If you fish braid, a fine 0.16mm to 0.20mm mainline is run behind a mono shock leader of similar tapered diameter.

Leader:

A shock leader is essential. The ready-made Shimano Speedmaster Surf Taper Leader or a heavier Technium is ideal, with the accepted rule being roughly 10lb of leader strength for every ounce of lead you cast. Make the leader at least twice the length of your rod plus a few extra turns on the spool, so the knot sits safely below the tip on the cast.

Why this setup works:

The heavy shock leader takes the full force of the cast that the lighter mainline cannot, while the stretch of nylon cushions the lunges of a fish in the surf and protects the hook hold. Keeping the knot below the tip means it never has to fly through the rod rings under load, so your cast stays smooth and safe every time.

Bottom fishing from a boat with bait for cod, conger, bream, rays and other species demands strength, abrasion resistance and the ability to hold bottom in tide, often over wrecks and rough ground.

Mainline:

A braided mainline is preferred for its thin diameter, which holds bottom in tide with less lead, and its sensitivity. A strong 8 strand braid like Shimano Kairiki 8, or the heavier Ocea Braid, handles wrecks and big fish while staying thin in the tide. A tougher 4 strand Kairiki 4 is a great value choice for rough ground, and the sinking Kairiki G5 helps a bait hold and follow the bottom. For light bottom fishing, a forgiving mono like Technium still has its place.

Diameter:

Boat bottom fishing braid is typically used in the 0.19mm to 0.36mm range, depending on depth, tide and the size of the fish and the lead needed to hold bottom.

Leader:

A strong, abrasion resistant leader is essential. Heavy fluorocarbon such as Ocea EX Fluoro Leader in 0.50mm to 0.80mm, or a heavy mono shock leader, protects against the wreck and the rough ground during long, powerful fights.

Why this setup works:

Thin braid cuts the tide so you hold bottom with less lead and feel every bite in deep water, while the heavy leader gives you the abrasion resistance and shock protection needed to pull a big fish up and away from the structure it lives in.

Light rock fishing, or LRF, is finesse saltwater fishing with tiny lures and light tackle for wrasse, mullet, bream, scorpionfish and a host of small species around rocks, harbours and breakwaters. Sensitivity and a natural presentation are everything.

Mainline:

A super fine braid is the preferred LRF mainline for its sensitivity and casting performance with tiny lures. A thin Shimano Kairiki 8 or Kairiki 4 in the finest diameters is ideal. Anglers who prefer simplicity can use a light Catana monofilament instead.

Diameter:

LRF is fished with very fine braid, usually in the 0.06mm to 0.10mm range (around PE 0.2 to PE 0.4), or a light mono around 0.16mm to 0.20mm. Start at 0.10mm braid; only experienced LRF anglers need to go finer.

Leader:

A light fluorocarbon leader such as Shimano Yasei Fluoro Leader is commonly used in diameters around 0.18mm to 0.25mm, the finest in the range, creating a near invisible presentation while adding a little stretch and abrasion resistance around the rocks. A leader of around 1m is plenty.

Why this setup works:

Ultra fine braid lets you cast tiny lures and feel the lightest taps from small, cautious fish, while the fine fluorocarbon leader keeps the presentation natural and invisible and protects the line where it rubs against rock and shell.

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SHIMANO SALTWATER FISHING LINES

 

These are the Shimano lines sold in Europe that suit saltwater fishing. Every Kairiki and Ocea braid is built around IZANAS, an ultra high strength polyethylene fibre approximately eight times stronger than steel wire. PowerPro, Shimano's partner braid brand, is also available across Europe for saltwater. Each line below has its own job to do. Read more on any product page to see all diameters, colours and spec details.

Shimano Ocea 17+ Braid
The absolute top of Shimano's braid development, made in Japan with a 17 strand construction: 16 IZANAS SF700 fibres wrapped around a central SF600 core. The core stops the line going flat and twisting under load, for a round, smooth profile, long casting and no wind knots, while the Heat Sink Coating sheds friction heat at the guides during hard runs. Available in PE6 to PE10 (105lb to 169lb), 300m multi-colour. Best for: offshore big game, popping and jigging for tuna, amberjack and the hardest fighting fish.
Shimano Ocea Braid
Shimano's premium 8 strand saltwater braid, made in Japan with TOUGH CROSS 2, a 45 degree tensioned weave for high abrasion resistance, a Heat Sink Coating to reduce guide friction heat, and FILAMENT X IZANAS fibre for strength and durability. Available in 400m, 0.20mm to 0.42mm (45lb to 151lb). Best for: offshore and heavy duty jigging and long distance casting against hard fighting species.
Shimano Kairiki 8+
The premium 8 strand braid for lure fishing. A renewed silicone based three layer coating and IZANAS material give superior water repellency, smoothness and durability, with balanced tension for precise control. Best for: anglers who want the smoothest, longest casting and longest lasting braid for shore and boat lure fishing.
Shimano Kairiki 8
The all round 8 strand braid in the Shimano family, built with the exclusive tight weave VT Construction and IZANAS fibre for a smooth, round, reduced diameter profile that casts well and runs quietly. Available in solid colours and a multi-colour version for jigging and deep water. Best for: all round shore and boat lure fishing and light to medium jigging.
Shimano Kairiki 4
A 4 strand braid with an exclusive tight weave VT Construction for a smoother finish and finer diameter than most 4 carrier braids, at the best price to performance ratio. Best for: value, rough ground, wrecks and abrasion resistant lure and bottom work.
Shimano Kairiki G5
A unique sinking braid made from 4 Japanese PE strands plus an extra high density core, so it has almost no stretch like braid but sinks like mono and resists wind and current. Best for: bottom techniques and vertical jigging where you want the line to sink and follow the bottom in deep water and tide.
PowerPro
Saltwater, anglers depend on PowerPro to provide an edge over standard Monofilament or even other super braids. Exclusive Enhanced Body Technology provides a rounder, smoother, slicker, and structurally superior ultra-strong braided line that enhances pitchin', flipping, jigging, casting, trolling, and big game fishing.
PowerPro Super 8 Slick V2
PowerPro Super 8 Slick V2, an eight end dense weave braid with the Enhanced Body Technology process for a stronger, thinner, smoother and quieter line that casts a long way. The original PowerPro is also available as a tough, proven all rounder. Best for: smooth long casting and versatile saltwater lure, jig and bottom work.
Shimano Speedmaster Surf
A dedicated surfcasting monofilament built for long distance casting and reliability in the surf, with the controlled stretch that cushions big fish and protects the hook hold. Best for: surfcasting and beach fishing for bass, flatfish, rays and cod.
Shimano Speedmaster Surf Tapered
A tapered surf mono with a thin running line and a thick casting end, so the built-in taper acts as a shock leader and takes the force of a full power cast with a heavy lead. Best for: surfcasting where you want a one-line setup with a built-in shock leader.
Shimano Tiagra Hyper Trolling
A premium big game trolling monofilament engineered for strength and reliability under extreme loads, also offered in an IGFA rated version. Best for: trolling for tuna, marlin and other big game.
Shimano Ocea EX Fluoro Leader
A dedicated surfcasting monofilament built for long distance casting and reliability in the surf, with the controlled stretch that cushions big fish and protects the hook hold. Best for: surfcasting and beach fishing for bass, flatfish, rays and cod.
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LEADER MATERIAL

Braid has almost no stretch and little abrasion resistance, which means it needs a leader to do its job properly. The leader is the section of line the fish inspects up close, the section that handles teeth, gill plates, rock and sand, and the section that decides whether your lure looks natural or unnatural in the water. In surfcasting the leader also takes the full shock of the cast. Here is the leader setup every saltwater angler should know.

Ocea EX Fluoro Leader is a strong starting points across a wide range of saltwater techniques. For shore lure fishing and light work, diameters around 0.30mm to 0.40mm give a near invisible, abrasion resistant presentation. For boat jigging, diameters typically step up to around 0.40mm to 0.60mm to handle the wreck and bigger fish.

Leader length:

Leader length depends on the technique. For shore lure fishing, around 1m to 2m works well, short enough that the knot stays in front of the tip ring on most casts. For boat and vertical jigging, around 2m to 3m is normal, and for heavy jigging and popping around 2m to 4m. Longer leaders can improve presentation in clear water and provide extra protection when fishing around structure. Only in surfcasting does the leader need to be at least twice the length of your rod, because there the knot is under full load during the cast.

There is a moment in a full power surf cast when everything tightens. The rod loads, the lead comes off the ground and the line takes the load. With a thin mainline behind a heavy lead the weakest part of the system will give way first, and a shock leader removes that risk.

Leader choice:

A purpose made tapered shock leader such as Surf Taper Leader is ideal. It ties cleanly to a mono mainline with a standard leader knot and to a braided mainline with an FG knot or similar braid to mono connection.

Diameter:

Use a leader that rises to around 0.57mm behind a 0.30mm to 0.35mm mono mainline, following the rule of roughly 10lb of leader strength per ounce of lead. Make your leader at least twice the length of your rod plus a few extra turns on the spool, so the knot stays below the tip during the cast.

Jigging and popping leaders are built for extreme conditions. Long fights, heavy fish and constant contact with reef and wreck require a leader that can handle both abrasion and sustained pressure.

Leader choice:

Heavy fluorocarbon such as Ocea EX Fluoro Leader is the standard choice, with heavy monofilament used as a shock leader for surface work. A strong FG knot or a wind-on leader connects the braid to the leader.

Diameter and strength:

Leader choice for big game is less about diameter and more about overall strength and abrasion resistance. Diameters commonly run from around 0.70mm up to 1.00mm and beyond, matched to the size of the fish and the structure being fished.

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FAQ

Braid is woven from many fine fibres and has almost no stretch, a very thin diameter and outstanding sensitivity, but little abrasion resistance on its own, so it needs a leader. Monofilament is a single nylon strand that stretches, is naturally abrasion resistant and is forgiving and easy to handle. In saltwater, braid is the choice for lure fishing, jigging and distance, while mono shines for surfcasting, shock leaders and forgiving bait fishing.

Start with how you fish. For lure fishing, jigging and feeling the bottom in deep water, choose a braid and add a fluorocarbon leader. For casting heavy leads in the surf, choose a mono mainline with a tapered shock leader, or a thin braid behind a mono shock leader. Then match the diameter to the size of fish, the depth and tide, and how snaggy the ground is, going heavier around rock and wreck and finer for clear water and small species. And if you are in doubt between two diameters, choose the heavier one: you give up a little finesse, but you land fish quicker and more safely, which is better for the fish and for your confidence.

A leader is a length of mono or fluorocarbon between your mainline and your lure or rig. With braid you almost always need one, because braid is visible up close, has no stretch and is easily cut by rock, sand and teeth. The leader adds invisibility, abrasion resistance and shock absorption. In surfcasting the leader is also a shock leader that takes the force of the cast.

Yes. Salt is hard on tackle. After a session, rinse your reel and the line on it with fresh water and let it dry, which keeps the line performing and protects your reel. Check the last few metres of leader and mainline for nicks and abrasion after fishing rough ground, and re-tie if in doubt. Quality braids with protective coatings and fluorocarbon leaders stand up to salt far better than untreated lines.

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