Do *NOT* Scuba dive with out this? – The 9 Best dive knives

dive knife

New divers often underestimate the significance of owning a good dive knife: you hardly use it but, when you do, it will be in a life or death situation. No, that doesn’t mean you will use the dive knife to fend off enemy divers. All it will actually do is cut you lose from lines, rope, vegetation, and other stuff that may trap you.

This can be quite scary because, under the water, you can’t call for help and plus nobody will see you if the water is dark. This guide will walk you through the steps needed to find the best dive knife.

Below are the best dive knife options we have chose for 2019, each one has different functions and price range. Our personal recommendation would be to get a high quality titanium dive knife to prevent rust problems, as if you go diving in salt water quite frequently, if you don’t have an anti rust blade your blade will end up to be useless and you will waste money having to buy a new one.

However, a stainless steel divers knife is easier to sharpen and will still resist rust/ corrosion that’s only if you remember to rinse it after every dive.  

The fact they are light weight and  can simply be strapped to your thigh, or placed into your BCD, there no real  excuse not to bring one with you on your next scuba diving adventure.

We have listed next to the name of the knife the best use for it i.e “best dive knife under 50$” or “best dive knife for beginners” this is to help you see quickly which would be the best one for you.

1. Aqua Lung Argonaut Titanium – Best dive knife

dive knife


The Aqua Lung Argonaut Titanium dive knife is designed to be the most tough and the absolute  best of the Agua Lung’s knives. This blade has its classic two distinct styles, the Spartan and the Blunt. The handles are wrapped in such a way that it provides a spot for the forefinger extra grip for the sheath.

The reviews for this knife speak for itself as “the only dive knife you will ever need” it is a little expensive but in the long run you will save money as this will last you a very long time.







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2. Tusa X-Pert II Titanium Divers Knife – Best lightweight dive knife best lightweight dive knife

The Tusa X-Pert II diving knife has  a distinctively sharp front and  a serrated back edge. The  line cutter that is included can slice through line quickly and easily, and the rubber ergonomic grip has to be one of the most comfortable we have gotten tried out.

The sheath is made of high quality plastic shell with a handy push button release that keeps the knife firm and  in place until it is needed.

This is a titanium dive knife, so while it takes a bit more effort to sharpen,  however, it will stay sharp longer and resist rust from sea  salt water far better than other cheaper dive knifes. It also made to be  extremely light weight so if you are looking for a good quality lightweight dive knife this is the one for you.




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sharpest dive kife

3. Cressi Alligator – Best Multi-purpose dive knife 

The Cressi Alligator is a compact and clever diving knife that can be use as knife as well as scissors it multi-functionality makes it useful and well worth the investment . It’s  size is small enough to fit in your BCD (mounts are included). The handle is only  just 3 inches long however the rubber insets and the wide guards provide a stern grip. This knife is ideal if you want a compact, multi-purpose, top quality knife.




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4. Mares Force Bat Titanium – Best dive knife for beginners best dive knife for beginners

The Mares Force Bat Titanium offers greater cutting sharpness with its custom-ground blade with unique serrations, allowing you to cut through a variety of materials effortlessly.

The Force Bat can also be easily opened with one hand making it easily accessible in a dire situation. This in our opinion makes it the best dive knife for beginners because it can be open with one hand making it easy to do so for a novice. Plus it is extremely sharp so it will cut through rope much easier then other dive knifes. Plus this is affordable at under $100.


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5. Promate Stainless Steel Knife  –  Best knife on a budget 


This dive knife by promate is a great knife and will do the job if you just need a knife with you in case of the worst. Its stainless steel so    you will need to rinse and lubricate it after every use. But ideal if you are on a budget and need to have a knife with you. The blade  is sharp and has a quick release function and adjustable straps and sheaths. plus you can dissemble this very easily for maintenance






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6. Cressi Skorpion Dive Knife –  Dive knife Under $50best dive knife under $50

The Cressi Skorpion is  the absolute ideal dive knife under $50 and our top pick in case of quality/price. It is an surprisingly versatile scuba diving knife which has the top 3 primary functions most divers look for. There is a serrated back edge that is ideal for cutting and sawing harder materials, a line cutter to safely and quickly cut through even the most toughest line, and a sharp front edge to the blade. This divers knife can be used for spear fishermen as well

The blade is made from anti rust resistant stainless steel material which makes it easy to sharpen, just remember to rinse it along with all your other scuba gear after a salt water dive. This is an extremely affordable dive knife which makes it attractive to a wide range of divers.





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7. US Diver’s Titanium knife – Best knife for disablement 

When you see  the US Diver’s Titanium knife,  This is a  very sharp sharp full size blade (5 inches to be exact) the line cutter  is just below the sharp blade, unlike typyical dive knifes where it is normally found on the back. This blade is full tang, and the entire knife can be disassembled which make it the best for quick cleaning It is a little more on the expensive  side but has great user reviews.


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8. Atomic Aquatics Titanium Ti6 – Best All Round Dive Knife

The Atomic Aquatics Titanium Ti6 is a lightweight, sturdy full-size dive knife which works perfectly in most situations, with the exception of heavy prying. It comes with both a serrated and smooth blade for those different types of uses and has a quality designed sheath. Making this an excellent choice if you are looking for a versatile knife that will not corrode.






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9. Cressi Orca – Best knife for a work tool

The Cressi Orca dive knife has been specially designed to be used as a work tool. It comes up quite bigger and heavier than most other dive knives, making the bigger jobs a lot easier.

Another useful feature this knife has is it has loops to attach the knife to either your leg or onto a belt. It comes with two leg straps. It’s the best option if you are looking for a knife to complete some work underwater.