Fishing holds fillet knives, bait knives and fishing-specific tools. It is a deliberately small, focused category rather than a broad tackle department, and everything in it is chosen for corrosion resistance and blade flex rather than for general utility.
Corrosion resistance first, because saltwater, blood and damp storage are the working environment. Then flex, because a fillet blade follows the contour of a fish rather than cutting straight through it.
Nitro-V is a strong choice for the job, as are the high-chromium budget stainless grades.
Rinse in fresh water, dry properly, and do not store the knife wet in a sheath. That single habit does more for a fishing knife than any steel choice.
See cleaning saltwater residue and using a fillet knife for other jobs.
As of this build the category holds 18 live products, which is 1% of everything we list, across 4 brands (Buck, Case, Gerber, Kershaw), priced from $3.75 to $61.43. The most expensive pieces in it today are Kershaw Curved Fillet 12in Blade, Kershaw Curved Fillet 9in Blade, Buck Silver Creek Fillet, Large.
These numbers are recounted every time the site is rebuilt, so they track the live catalog rather than a figure typed in once.