When it comes to fishing, we often think of having the best fishing rod first. After all, it is to a dedicated angler or fisherman what a sword is to a knight or soldier. However, even with one in hand, all efforts at throwing in the hopes of getting a large catch will mean nothing as it is useless without a strong enough fishing line.

On Amazon, there are heavy-duty fishing lines available that are strong enough to catch heavy fish in both saltwater and freshwater areas. Although not all are made equal, with some being made to be invisible enough not to be seen by your intended target, many can go as far as up to 3,000 yards and can catch fish as heavy as up to 150 pounds. Truly, they make sure that your future fishing sessions at the lake, river or sea will not be without satisfactory results.

Here are 12 of the best heavy-duty fishing lines currently available on Amazon:

1. KastKing Superpower Braided Fishing Line
(photo from amazon.com)

The KastKing SuperPower Braided Fishing Line gives you the strength needed to reel in big ones with confidence, thanks to its greater abrasion resistance. It has dynamically incorporated strands that allow you to tie a more solid knot easily, resulting in better casting and knot strength, and has a smaller diameter compared to other brands that let you spool more fishing lines on to your reel.

2. RUNCL PowerMono Fishing Line
(photo from amazon.com)

The RunCl PowerMono has amazing strength that enables it to withstand sudden, aggressive strikes and deliver solid hooksets, providing excellent shock strength, abrasion resistance and knot strength for maximum castability. This easy-to-tie fishing line is constructed from less density for neutral buoyancy so it sinks slowly and actually suspends on water -- a good thing when fishing topwater baits and buoyant treble hooked lures.

3. RunCl PowerFluoro Fishing Line
(photo from amazon.com)

Like the RunCl PowerMono, the PowerFluoro has enough strength to withstand sudden and aggressive strikes and deliver solid hooksets for maximum castability. In addition, thanks to its light-refractive index which is nigh-identical to water, it is also virtually invisible to fish in the water for a stealthy presentation, allowing it to be used in any water condition.

4. Stren High Impact Monofilament Fishing Line
(photo from amazon.com)

A great combination of strength, durability and impact resistance, the Stren High Impact Monofilament Fishing Line is ideal for delivering performance that serious anglers, both coastal and offshore, demand on casting, spinning and trolling reels. It offers superb clarity and excellent transparency for ultra-low visibility, and is durable and well-suited to every saltwater pursuit from bay and coastal fishing to even blue water fishing.

5. Berkley Trilene Big Game Fishing Line
(photo from amazon.com)

The Berkley Trilene Big Game Fishing Line boasts extreme fighting power for big game saltwater or freshwater fish due to its incredible strength, reliability and value, making it one of the most popular monofilament fishing lines in North America. It also boasts exceptional abrasion resistance so it is super tough against rough or sharp objects and has outstanding knot strength for durable holding power.

6. Piscifun Onyx Braided Fishing Line
(photo from amazon.com)

The Piscifun Onyx Braided Fishing Line is built for toughness, with a best-in-grade Nano Resin Coating increasing abrasion resistance by 10%, making it tougher compared to other fishing lines on the market. It has strong knot strength, thanks to 4/8-fiber strand construction that allows you to tie a more solid knot that helps prevent your catch from coming off.

7. Dorisea Extreme Braid Fishing Line
(photo from amazon.com)

The Dorisea Extreme Braid Fishing Line brings ultimate strength in every cast, thanks to its 4-strand ultra-high molecular weight polyethylene (UHMWPE) fiber construction. It has superior abrasion resistance, ultra-sensitive near-zero stretch, low memory and thin diameter for easy casting and handling.

8. Hercules Braided Fishing Line
(photo from amazon.com)

The Hercules Braided Fishing Line delivers the same quality as those from other brands at an affordable price. It is made from UHMWPE, the world's strongest PE fiber, with enhanced coating for additional durability that increases the chances of getting a big catch, and is also sensitive to fish bites so you will know if you have caught one on water.

9. Hi-Seas Grand Slam Mono
(photo from amazon.com)

Hi-Seas Grand Slam can catch anything, from ultra-light to big game fish. Available in clear, smoke blue, fluorescent yellow, green and pink colors, it provides high-impact strength, excellent abrasion resistance and superior knot strength that all allow this tough fishing line to take on even the biggest, toughest catches on both salt and freshwater areas.

10. RunCl PowerBraid Braided Fishing Line
(photo from amazon.com)

RunCl's PowerBraid Fishing Line delivers abrasion resistance and unbeatable strength with a smaller diameter -- 20% thinner compared to braided lines of comparable knot strength -- for extraordinary lure action and low visibility that helps spool more on to your reel. Constructed using patented PowerBraid Seamless Weaving Technology, it is made of imported raw fibers, and is two times more resistant than others.

11. Reaction Tackle Super Strong PE Braided Line
(photo from amazon.com)

The Reaction Tackle Super Strong PE Braided Fishing Line proves that quality and affordability go hand in hand. This 4/8-strand braided fishing line is made from UHMWPE, and is super thin and slick enough to glide through fishing rod guides, with a small diameter making it super strong and hard to break, helping you catch more fish.

12. Berkley Trilene XT Monofilament FishIng Lin
(photo from amazon.com)

Built for rough fishing conditions, the Berkley Trilene Extra Tough Monofilament Fishing Line is over 45% more flexible compared to previous Trilene lines, thanks to its improved knot strength. Its increased abrasion resistance ensures that it can withstand rough and sharp objects it encounters while fishing. The fishing line has more than enough strength to fight fish under heavy cover and is manageable enough to make it ideal for flipping, pitching or casting.