Gear extras can make diving easier, safer and more fun — we've compiled this list of scuba diving knives in our 2018 scuba diving Gear Buyers Guide to help you find the one that's best for you.

Unlike other aspects of scuba diving, squeeze is a good thing because it's how you close the locking blade on Aqua Lung's new line of dive knives. Instead of a typical push-button mechanism, this model unlocks when you apply pressure to the nylon handle. The Speartip TI is available in durable stainless steel or ultralight titanium, and includes a line cutter and bottle opener.

Aqua Lung's new line of dive knives offers a user-friendly squeeze to the unlock mechanism for added safety. Available in stainless or titanium, the compact blade offers multiple cutting surfaces, including a handy and capable integrated line cutter. Other convenience features include a lanyard hole, channels for leg straps and connection points to secure to your BC.

This lightweight and compact line cutter features ultra-sharp ceramic blades mounted inside a high-impact resistant polycarbonate body. The two-sided ceramic blades are very durable and the ideal solution for fast, easy cutting. Included is a high-quality nylon sheath with both vertical and horizontal options for mounting on a harness, BC or weight belt up to 2 inches wide.

The first in a new Tactical series of dive knives, the TK15 is built around a single piece of marine-grade stainless steel machined to achieve the ideal balance of strength and weight. The blade is 6 inches long and features a smooth edge and an upper serrated edge positioned close to the handle to maximize cut control. There's also a shackle key and line cutter.

Spyderco's newest and most stylish addition to its Salt Series of knives, the Caribbean Leaf features a flat-ground, leaf-shaped blade precision-machined from LC200N - a nitrogen-based martensitic steel that holds an edge extremely well and is completely rustproof. Available with either a PlainEdge or SpyderEdge cutting edge, the blade is housed in a vibrantly colored handle sporting an intricately machined non-slip pattern for easy gripping.

The newest version of Spyderco's popular Dragonfly 2 Salt Lightweight knife combines the proven design of the Dragonfly 2 platform, the reliable quality of H-1 steel, an advanced nitrogen-based alloy that is completely immune to rust, and the extreme cutting power of a hawkbill blade. A compact, yet highly efficient cutting tool, this compact knife measures 5.49 inches overall with a 2.3-inch blade.

A new addition to Spyderco's Salt Series, the fixed-blade Fish Hunter is specifically designed for the demanding needs of freedivers and spearfishermen. Its symmetrical hollow-ground blade is made from strong, corrosion-resistant H-1 steel. The blade's SpyderEdge serrated cutting edge makes quick work of fishing line and rope, and the handle is injection molded from fiberglass-reinforced nylon with high-traction bidirectional texturing.

The new Salt 2 comes with a 100 percent rustproof, nitrogen-based, hollow-ground, H-1 steel blade with a choice of PlainEdge or SpyderEdge cutting edges. Like all Spyderco folding knives, it features the trademark round hole in the blade for easy one-handed opening. The bright-yellow handle provides bidirectional texturing for a secure grip, and multiple threaded inserts to anchor a titanium pocket clip.

You never want to get caught in netting or fishing line without a way to get out. The Blue Tang Titanium dive knife is designed with a hook at its base to help cut through any entanglement. Its sharp, corrosion-resistant, titanium blade is 5 inches long with both straight and serrated edges and a drop-point tip. The Blue Tang Titanium also disassembles for thorough cleaning.