How to Clean and Gut A Fish

Underwater shot of the fisherman holding the fish

Knowing how to clean and gut a fish is a useful skill for any angler. Whether you are preparing fresh walleye for dinner at camp or saving your catch for later, proper cleaning helps protect the flavour, texture, and quality of the fish.

For anglers on remote Northern Ontario fishing trips, good fish care starts as soon as the fish is kept. Keeping the fish cool, cleaning it carefully, and using a clean workspace all make a difference. The process does not need to be complicated, but it should be done with care from start to finish.

Keep Your Catch Cool Before Cleaning

Before you begin cleaning a fish, keep it as cool as possible. Heat can affect freshness quickly, especially during warm weather or long days on the water. If you are keeping fish for a meal, place them on ice or in a cooler until you are ready to clean them.

Try to avoid letting fish sit in direct sun or warm water. If ice begins to melt, drain excess water and add more ice when needed. Starting with a properly cooled fish makes the cleaning process easier and helps preserve quality.

Set Up a Clean Work Area

A clean surface is important when preparing fish. Use a fish cleaning table, cutting board, or other stable surface that can be washed before and after use. A sharp fillet knife, clean water, paper towel, and a container for waste should all be nearby before you start.

If you are cleaning fish at camp, be mindful of where waste is placed. Fish remains can attract wildlife, so always follow camp rules and local guidelines for disposal. Taking a few extra minutes to keep the area clean helps protect both people and wildlife.

Rinse and Prepare the Fish

Before gutting the fish, rinse away slime, dirt, or debris with clean, cold water. Hold the fish securely on the cleaning surface and work carefully so the knife does not slip.

Some anglers remove fins before cleaning, while others leave them in place until later. Either approach can work. The most important thing is to keep control of the fish and use slow, steady movements.

Make the First Cut

To gut the fish, place the tip of your knife near the vent on the underside of the fish. Carefully cut forward toward the head, keeping the blade shallow. You do not need to cut deeply. A shallow cut helps avoid puncturing the organs, which can affect cleanliness and flavour.

Once the belly is open, gently remove the internal organs. Work slowly and pull everything out cleanly. If anything remains inside the cavity, use your fingers or a spoon to remove it.

Rinse the Cavity Thoroughly

After the fish has been gutted, rinse the inside cavity with clean, cold water. Remove any bloodline or remaining tissue along the backbone. This step helps reduce strong flavours and keeps the fish cleaner for cooking or storage.

Once rinsed, pat the fish dry with paper towel. From there, you can cook the fish whole, remove the head if preferred, or continue filleting depending on how you plan to prepare it.

Store or Cook the Fish Promptly

Fresh fish is best when it is cooked soon after cleaning. If you are not cooking it right away, store it in a sealed bag or container and keep it cold. Fish that will not be used within a short period should be frozen in airtight packaging to help prevent freezer burn.

Good handling makes a noticeable difference. Clean the fish promptly, keep it cold, and avoid leaving it uncovered or exposed to warm air longer than necessary.

Enjoy Fresh Fish on Your Next Trip

Cleaning and gutting a fish is a simple skill, but it can make your time on the water more rewarding. When you handle your catch properly, you get the best possible flavour from the fish you worked hard to catch.

If you are planning a remote fly-in fishing trip in Northwestern Ontario, Mattice Lake Outfitters can help make the experience comfortable and well organized. Our fly-in camps offer access to excellent walleye and northern pike fishing, and all camps include screened fish cleaning houses to make preparing your catch easier. Whether you are heading to Ogoki Reservoir, Mojikit Lake, or Short Lake, contact us today to start planning your next fishing adventure.