Divers of all preferences know that below water, you can be faced with plenty of obstacles that could meddle with the diving experience, like nets, fishing lines, ropes, and more.

You never know what you might come across down in the depths of water, and that’s why you should always be ready with a multi-purpose dive knife. In this article, I’ll recommend some of the best dive knives that you can grab on your next diving adventure.

Comparison Table

KnifeTipWeightBlade Length
Spyderco Salt 2Sharp2 ounces3 inches
Spyderco Atlantic SaltSharp0.08 grams3.68 inch
EEZYCUT Trilobite KnifeBlunt4 ounces2.5 inches overall
Cressi LimaSharp1.6 ounces2.44 inches

The 4 Best Dive Knives

1. Spyderco Salt 2 – Best Overall

Spyderco is a popular name when it comes to diving knives, and you can see why when you consider the features on the Salt 2.

Firstly, this knife comes with a molded fiberglass reinforced nylon (FRN) handle that gives you a comfortable and firm grip, as well as a nitrogen-based H-1 steel blade that provides you with unprecedented resistance against rust. As for the other metal components, they’re all made of rust-resistant alloys.

It weighs only 2 ounces, despite coming with a 3-inch blade that gives you the cutting capability you need without getting in the way.

Moreover, there’s a hollow grind with bevels that can extend all the way to the width of the blade or only a section of that, depending on what you prefer. Not to mention, the bevels come with a concave radius and are ground.

It’s worth mentioning that the Spyderco Salt 2 is a smooth blade, meaning that it comes with no teeth or serrations. That’s the main reason why this plain-edge blade is only capable of cutting thinner materials and doesn’t suit thick ropes.

Closed and packed, it measures 4.25 inches, while it measures 7.25 inches when opened with a 3-inch blade.


  • High-quality construction
  • Very durable and rust-proof
  • Ideal blade length


  • Only cuts through thinner materials

2. Spyderco Atlantic Salt – Value for the Price

The Spyderco Atlantic Salt is another Salt Series knife by Spyderco, which hits a balance between the serration of edges for effective rope-cutting and a foldable blade with a highly secure locking mechanism. For guaranteed security to your equipment, it also comes with a titanium pocket clip, which makes it easier to store in pockets of your BCD.

For the blade, Spyderco uses nitrogen-based H-1 steel blades, just like the Salt 2, which is why it’s also effective in resisting rust. It also comes with a hollow grind and extendable bevels, but this one utilizes Spyderco’s Spyderedge blade with multiple serration patterns, alternating between two small serrations and a large one to maximize the cutting edge’s surface area. This design gives it a 24% boost.

Moreover, the best part about its ergonomic handle is that it can be gripped tightly, even with gloves on, thanks to the FRN handle.

When closed, the Spyderco Atlantic Salt is 4.59 inches and 8.27 inches when extended, with the blade comprising 3.68 inches of those.


  • Super high-end design
  • Easy to grip one-handedly
  • Foldable design
  • Incredibly lightweight


  • Unreliable tightening mechanism

3. EEZYCUT Trilobite Knife – Best Blunt Tip

If you’re looking for a blunt-tipped diving knife, you’ll find none better than the EEZYCUT. Despite the blunt tip, it has one of the sharpest cuts out there, with an ability to go through 8mm to 12mm-thick ropes.

This knife comes with a harness pouch that securely keeps it in place, which you can attach to any 2-2.50-inch wide webbing. What’s more, there’s a wrist pouch that you can attach to your 1.5-inch wide-gauge strap. Finally, you get a Flexi pouch that’s both accessible and flexible enough to be wrapped around webbing or backpack straps.

Though admittedly, the blade on this one isn’t the most durable and might be more prone to rust than others.


  • Reasonable price
  • Safety of a blunt tip
  • Plenty of available colors


  • Blade is prone to rust

4. Cressi Lima – Budget Option

Cressi is a well-known name in the world of diving and snorkeling, and the Cressi Lima is an excellent illustration why. This budget-friendly dive knife is very compact and easy to attach to diving gear.

With Japanese stainless steel 304 for the blade, you can rest assured that it’ll face the salt of seawater without deterioration in its cutting capability. While its blade is a little short at 2.44 inches, it’s still compelling enough.

Moreover, the sheath it comes with has a one-handed mechanism that makes its attachment to BCD straps or weight belts very easy. You can even attach its sheath to BCD hoses using hose holders for further facilitating extraction.


  • Highly affordable
  • Anti-slip grip
  • Very compact
  • Can be attached to air hoses or BCDs


  • Doesn’t sit well in the sheath