What knife do you need to fillet a fish?

A thin, flexible blade around 6 to 9 inches, and above all a sharp one. Sharpness matters more than the knife: a dull blade tears flesh instead of slicing it, wanders off the bone, and is far more likely to slip and cut you. A cheap fillet knife kept sharp beats an expensive one that is not.

Do you scale a fish before filleting it?

Not if you are taking the skin off, which is the usual reason to fillet rather than gut. Scaling matters when you intend to cook the fillet skin-on, or when you are cooking the fish whole.

How do you get the pin bones out?

Run a fingertip along the centreline of the fillet to feel them, then pull each one out with pliers or tweezers in the direction it points — toward the head. Pulling against the grain tears the flesh. Alternatively cut a narrow V either side of the line and lift the strip out, which costs you a little meat and no time.

What actually makes a fish taste good?

What you do in the first ten minutes, more than anything you do with a knife. A fish killed quickly and put straight on ice tastes markedly better than one left in a warm bucket or on a stringer. Flesh quality degrades fast at air temperature, and no filleting technique recovers it.

Is it safe to eat fish I catch?

Usually, but it depends on the water. US states publish fish consumption advisories covering specific waters and species, often with different guidance for children and people who are pregnant. Those advisories are the authority — check your state agency for the water you fished, not a general rule.

How to Fillet a Fish

Filleting is four cuts and one genuinely sharp knife. Behind the gill plate down to the spine, along the spine to the tail, free the fillet from the ribs, then take it off the skin. Everything else is practice — and what happens in the first ten minutes after you land the fish matters more than your knife work.

Published August 29, 2026

Four cuts and one genuinely sharp knife. Cut behind the gill plate down to the spine, turn and run along the spine to the tail, free the fillet from the rib cage, then separate it from the skin. That sequence works on almost every fish you are likely to keep.

The part nobody tells you: what happens in the ten minutes after you land the fish matters more than your knife work.

Before the knife: the part that decides the taste

A fish killed quickly and put straight onto ice tastes noticeably better than one left in a warm bucket, on a stringer, or in the bottom of the boat. Flesh softens and the flavour turns at air temperature, and no amount of careful filleting recovers it later.

If you intend to keep a fish, decide that quickly, dispatch it, and get it cold. If you do not intend to keep it, put it back straight away rather than leaving the decision to the end of the session — a fish held for an hour and then released is often a fish that dies anyway.

The four cuts

1. Behind the gill plate, down to the spine. Lay the fish on its side. Cut in just behind the gill plate and pectoral fin, angled slightly toward the head so you do not waste the shoulder meat. Stop when you feel the spine — do not cut through it.

2. Turn and run down the spine. Rotate the blade toward the tail and lay it almost flat against the backbone. Use long, smooth strokes rather than short sawing ones, keeping the blade riding on the bone. You should feel the ribs ticking under the knife. Run all the way to the tail and take the fillet off.

3. Off the ribs. Lay the fillet skin-side down. Slide the blade under the rib cage at a shallow angle and cut the ribs free in one sheet, staying as close to the bones as your nerve allows. Every millimetre you leave behind is meat you paid for.

4. Off the skin. Fillet skin-side down, tail toward you. Cut down to the skin about a centimetre from the tail end, then turn the blade flat and push forward while pulling the skin back against it. The blade stays still and slightly angled down; the skin does the moving.

Repeat on the other side. Then feel along the centreline for pin bones and pull them toward the head with pliers — that is the direction they point, and pulling the other way tears the flesh.

The knife matters less than the edge

A thin, flexible blade of around 6 to 9 inches is the right tool, but sharpness beats every other consideration. A dull knife tears rather than slices, wanders off the bone and wastes meat — and it is considerably more dangerous than a sharp one, because it needs force, and force is what slips.

Sharpen before the session, not after the third fish.

Cut-resistant gloves are not overcautious

You are working a very sharp blade toward your own hand on a wet, slippery surface. A cut-resistant glove on the hand holding the fish costs little and removes the most likely injury on this list. Fish spines and gill plates are sharp too.

Before you keep anything: check the advisory

Fish from most waters are fine to eat, but that is a statement about the water, not about fish in general. US states publish fish consumption advisories for specific waters and species — how many meals per month, often with separate and stricter guidance for children and for people who are pregnant.

Those advisories are the authority, and they are water-specific. Check your own state agency for the water you actually fished. No general rule, including anything on this page, substitutes for that. The EPA maintains a national listing of state fish advisories if you do not know where your state publishes its own.

The same goes for size and bag limits: what you may keep is set by your state agency and changes.

Fishing knots — which knot for which line
Spawning calendar — what is spawning each month, and when to leave fish alone
Rigs & setups — what goes on the line, in order

Sources

Fish and Shellfish Advisories and Safe Eating Guidelines — US Environmental Protection Agency — how state consumption advisories work and where to find your own state's

Frequently asked questions

What knife do you need to fillet a fish?: A thin, flexible blade around 6 to 9 inches, and above all a sharp one. Sharpness matters more than the knife: a dull blade tears flesh instead of slicing it, wanders off the bone, and is far more likely to slip and cut you. A cheap fillet knife kept sharp beats an expensive one that is not.
Do you scale a fish before filleting it?: Not if you are taking the skin off, which is the usual reason to fillet rather than gut. Scaling matters when you intend to cook the fillet skin-on, or when you are cooking the fish whole.
How do you get the pin bones out?: Run a fingertip along the centreline of the fillet to feel them, then pull each one out with pliers or tweezers in the direction it points — toward the head. Pulling against the grain tears the flesh. Alternatively cut a narrow V either side of the line and lift the strip out, which costs you a little meat and no time.
What actually makes a fish taste good?: What you do in the first ten minutes, more than anything you do with a knife. A fish killed quickly and put straight on ice tastes markedly better than one left in a warm bucket or on a stringer. Flesh quality degrades fast at air temperature, and no filleting technique recovers it.
Is it safe to eat fish I catch?: Usually, but it depends on the water. US states publish fish consumption advisories covering specific waters and species, often with different guidance for children and people who are pregnant. Those advisories are the authority — check your state agency for the water you fished, not a general rule.