Spearfishing Knives

Of course! At decathlon.com.gr you will find specialized spearfishing knives that are the most critical safety and management tool for every underwater hunter. Discover a carefully curated collection of diving knives with a well-thought-out, hydrodynamic design and robust handle, so you can use them with absolute stability even when wearing thick neoprene gloves. Their blades are made of high-quality stainless steel for maximum corrosion resistance, while featuring a double-sided edge—a straight side for precise cuts and a serrated side to easily cut through thick ropes, nets, or fishing lines in case you get tangled. Additionally, they are compact and come with their own safety sheaths, designed to mount easily on your belt, leg, or arm for instant access with one motion, making them ideal both for your safety and for quickly euthanizing your catch. To keep their blade sharp and rust-free, it is important to rinse them thoroughly with fresh water after each use and dry them before putting them back in their sheath.

The underwater knife is not a decorative item, nor is it an offensive tool; it is the most important safety and survival tool that every spearfisher must carry, regardless of their level. The main reason you need it is to ensure immediate release in an emergency, as the seabed hides dangers such as abandoned nets, thick fishing lines, or ropes in which you can easily get tangled. In such a situation, where the seconds of apnea are numbered, a sharp knife can instantly cut through the obstacle and save your life. At the same time, it is essential for the proper management of your catch, as it allows you to dispatch the fish quickly right after the shot. This prevents the fish from thrashing about, avoiding the risk of it tearing free, tangling your lines, or attracting larger predators.

Choosing the ideal position for your knife is determined by one basic rule: you must be able to draw it in a fraction of a second, even with your eyes closed, using whichever hand is available. The most common and safe positions on the body are on the inside of the calf or on the forearm. Mounting on the inside of the calf (rather than the outside) is preferred to prevent the knife from snagging on rocks, seaweed, or nets while swimming, while forearm mounting offers direct visual contact and extremely fast access. Another excellent option is mounting on the weight belt or on the chest if you wear a weight vest. On the belt, the knife is placed in front and slightly toward the side of your dominant hand, offering the unique advantage of being close to the center of your body and easily accessible with both hands.

Saltwater is one of the most corrosive environments, which is why choosing the right blade material determines the lifespan and reliability of your knife. The ideal choice depends on your budget and the maintenance you are willing to perform. High-quality stainless steel offers the best value for money, as it ensures excellent cutting performance and high durability, provided you rinse the knife with fresh water and dry it well after every dive. On the other hand, if you are looking for ultimate resistance without compromises, titanium is the premium material, as it never rusts or oxidizes in saltwater and is incredibly lightweight, though it comes with a higher purchase cost.

The most important step for properly cleaning your spearfishing knife is a thorough rinse with fresh water immediately after every dive to completely remove the salt. Never let it dry on its own inside its sheath; take it out, wipe it down well with a clean cloth, and let it dry completely before storing it, as trapped moisture is metal's number one enemy. To protect the blade from oxidation, it is a good idea to apply a thin layer of silicone oil or petroleum jelly after drying. At the same time, do not neglect to rinse and clean the sheath, as well as the mounting clips or straps, ensuring that the release mechanism operates freely and is free of salt build-ups or sand that could jam it.