8 Best Dive Knives for Spearfishing 2026

This is not just a dive knife—it’s a precision-engineered survival tool built for the unforgiving underwater world. The SORD 4′ dive knife stands out with its high-carbon steel full tang blade, delivering exceptional edge retention and superior corrosion resistance, making it a top-tier companion for serious spearfishing expeditions. Wrapped in an ergonomic G10 handle, it offers a rock-solid grip even when slick with saltwater, solving one of the most common frustrations divers face: slippage during critical moments. Whether you’re dispatching a catch or slicing through tangled kelp, this knife turns pressure into performance.

In real-world testing across reef dives and deep wrecks, the SORD knife proved its mettle with a razor-sharp keen edge and aggressive serrations that cut through monofilament lines and fibrous marine growth like butter. At just under 8 inches overall and weighing minimally, it balances power and agility, allowing for fast deployment and controlled use without dragging you down. The pointed tip excels at detailed work—like freeing a snagged spear—while the serrated spine bites through stubborn ropes when brute force is needed. That said, its rigid profile isn’t ideal for tight pockets or minimalist rigs, and the sheath, while secure, lacks the magnetic quick-draw convenience of some rivals.

Positioned against the Koah and Riffe models, the SORD carves its niche as the most well-rounded performer—ideal for divers who want tactical durability without sacrificing finesse. It outclasses budget options in material quality and handles high-stakes scenarios better than ultra-compact picks like the SEAC Devil. While not the lightest or cheapest, it delivers exceptional value through build integrity and functional versatility, making it the clear choice for those who treat every dive as a potential test of gear.

The Riffe EDC 4.5′ knife is a masterclass in precision cutting—crafted for divers who demand surgical accuracy over brute force. Built with 420 heat-treated stainless steel, this blade holds a fine edge and boasts the rare ability to cut through stainless steel cable, a game-changer when dealing with aggressive fish or reinforced fishing lines. The Teflon coating ensures long-term corrosion resistance, and the balanced 9′ overall length gives you reach without sacrificing control. For spearos who need a reliable tool for delicate dispatching or precise line work, this knife delivers unmatched finesse.

In actual use, the Riffe shines during close-quarters tasks: cleanly slicing through cartilage, trimming leader lines, or freeing a jammed reel. Its smooth edge allows for controlled, clean cuts, while the blade’s rigidity prevents bending under lateral pressure. The nylon locking sheath keeps it secure on your thigh, and the included lanyard adds peace of mind during deep drops. That said, it lacks serrations, limiting its effectiveness on fibrous materials, and the rubber straps, while functional, aren’t as adjustable as premium systems found on other models.

Against the SORD and Koah knives, the Riffe positions itself as the specialist’s choice—less versatile but superior in exacting cuts. It’s not the best for heavy chopping or emergency sawing, but for precision-focused spearfishing, it outperforms broader, multi-role blades. While it doesn’t offer magnetic access or ultra-lightweight materials, it provides superior edge quality and task-specific mastery, making it ideal for hunters who value clean, controlled performance over all-around utility.

Don’t let its size fool you—the SEAC Devil is a compact powerhouse designed for divers who refuse to carry unnecessary bulk. Measuring just under 6 inches overall, this mini dive knife slips seamlessly into tight wetsuits or buoyancy compensators, making it the ultimate emergency backup for scuba and spearfishing adventures. Its tempered stainless steel blade may be short, but it’s surprisingly capable of cutting through webbing, thin lines, and soft entanglements, while the Push & Pull Out sheath allows for single-handed deployment, even with thick gloves—a critical feature when every second counts.

In practice, the SEAC Devil excels as a safety tool, not a primary cutting instrument. It’s perfect for freeing a snagged fin strap or slicing a stray line during a drift dive, but it struggles with thicker ropes or dense kelp. The safety lock mechanism keeps the blade secure during kicks and rolls, though it can feel stiff on first use. While it lacks serrations, a line cutter, or any high-grip texturing, its minimalist design is its strength—light, unobtrusive, and always ready.

Compared to the 9-inch SZCO or full-sized Riffe, the SEAC Devil isn’t meant to dominate tasks—it’s meant to save space and save lives. It’s the ideal pick for travel divers, free divers, and minimalist rigs where every ounce matters. While it doesn’t offer the utility of larger knives, it delivers unmatched portability and glove-friendly access, making it the smart choice for those who want a reliable safety net without the weight.

The punada dive knife is a multi-function powerhouse, designed not just for underwater emergencies but for land-based adventures too—making it a favorite among hybrid divers who also hike, camp, or rescue. Built with 440C stainless steel, it offers excellent hardness and edge retention, with both a razor-sharp smooth edge and serrated section for handling diverse materials. The dual-sheath system—one plastic, one nylon—gives you flexibility in mounting, while the two pairs of adjustable thigh straps ensure a custom fit whether you’re diving deep or trekking through brush.

In use, the punada shines as a tactical survival tool: it cuts rope, digs into soil, and even serves as a defensive instrument when needed. The one-button quick-release sheath allows fast draws, though it occasionally jams after saltwater exposure. The 8.65-inch profile gives solid reach, but the black finish makes it hard to spot in low visibility, a serious drawback underwater. While it’s not as corrosion-resistant as Teflon-coated or titanium models, proper maintenance keeps it functional.

Compared to the Koah or SEAC Devil, the punada trades specialization for versatility, positioning itself as the ultimate all-rounder for outdoor enthusiasts. It’s not the best spearfishing knife, nor the lightest, but for someone who wants one tool for diving, camping, and emergency prep, it’s unmatched. While it lacks premium materials, it delivers incredible utility and customization options, making it the top pick for adventurers who dive but live beyond the water.