A lot goes into catching tuna. The early mornings, fuel, tackle, and hours spent looking for fish all lead up to the moment one finally comes over the rail. But the work isn't finished once the fish hits the deck. What happens next decides the quality of every meal that comes from it.

I follow the same care process for every fish I keep. My goal is to handle it properly, get it cold, and recover as much usable meat as possible. If I'm going to take a fish home, I want to make the most of it.

Quick steps: Bleed the fish using ikejime (brain spike, gill and pectoral cuts, spinal wire). Let it bleed over the side for 10–30 minutes. Remove the gills and guts, pack the cavity and body in ice, and let it chill for 6–8 hours. Fillet it while it's cold, pat each cut dry, and refrigerate at 40°F or below. Vacuum seal and freeze anything you won't eat within 1–2 days.

What You'll Need

• Brain spike and thin steel spinal wire
• Tail rope
• A cooler with plenty of ice (and room for the fish)
• 8-inch curved fillet knife
• Clean paper towels
• Resealable bags
• Vacuum sealer
• Squeegee for the fillet table

Start With What You Plan to Keep

Taking care of the catch starts before the gaff comes out. I try not to kill more fish than I need, which includes what I'll eat and what I know friends will use. Tuna provides a lot of meals, so before keeping another fish, think about where that meat is going. Having room in the cooler doesn't mean there's a reason to fill it.

Plenty of ice matters just as much. Long runs back to the dock and the drive home on hot summer days take a toll on your catch. With little or no ice, the meat can lose quality or spoil. If you plan to keep a fish, come prepared to keep it cold the entire way home.

Personally, I'd rather let a fish live than bring it home and waste it. Sharing fresh fish with people who appreciate it is one of my favorite parts of a successful trip. And before you keep any fish, know the permit and reporting requirements for your species and area.

Dispatching and Bleeding the Fish

Once a fish is landed, I want the crew ready to handle it without delays. I use a Japanese method called ikejime. It has three steps: brain spike the fish, bleed it through cuts at the gills and behind the pectoral fin, then run a thin steel wire down the spinal cord.

A correct brain spike quickly renders the fish insensible. The spinal wire stops continued muscle movement, which can help prevent lactic acid buildup and preserve the quality of the flesh.

Let It Chill All the Way Through

I like to keep my fish packed in ice for six to eight hours before breaking it down. I want it thoroughly chilled, with firm meat that allows for clean cuts.

That's my usual process, not a fixed rule. A larger fish takes longer to chill through than a smaller one, and the amount of ice and the conditions matter too. A cold exterior doesn't mean the center is equally cold.

I keep checking the ice and topping it off as needed. Getting the fish cold is only part of the job. Keeping it cold through cleaning, transport, and storage matters just as much.

Take Your Time Breaking It Down

Everyone has their own method for cutting fish. My priority is recovering as much usable meat as I can. I like an 8-inch curved fillet knife. With the fish thoroughly chilled, I can follow the bones and make controlled cuts without fighting soft meat.

This is where slowing down pays off. Rushing through a fish can leave good meat on the rack or damage portions that could have been clean cuts. Before throwing anything away, I check what's left. The rack in the photo below shows what I aim for: meat recovered carefully, with nothing useful left behind.

Dry and Package Each Cut

After breaking the fish down, I pat each cut dry with clean paper towels and place it in a resealable bag. From there, it goes into the refrigerator or stays properly chilled while I deliver it to friends. I replace the paper towels as they absorb moisture.

Drying is part of my quality routine, but it doesn't replace refrigeration or extend safe storage time. Fresh fish should be kept at 40°F or below and cooked or frozen within one to two days.

I also keep the cutting area, knife, and packaging clean. I like to use a squeegee to keep the fillet table clean and dry.

Freeze What Won't Be Eaten Fresh

I prefer fresh tuna. After putting that much effort into caring for a fish, enjoying it fresh is hard to beat.

But when I know a portion is going into the freezer, I vacuum seal it and freeze it right away. I don't leave it in the refrigerator for days before deciding what to do with it. Meal-sized portions make this easier, since they let someone thaw what they need without dealing with a much larger piece.

When thawing vacuum-sealed fish, take it out of the vacuum packaging before thawing it in the refrigerator. That's an important food safety step.

Make Every Fish Count

Caring for tuna takes preparation and attention. Have the tools ready, bring enough ice, take your time at the cutting table, and have a plan for the meat.

For me, that effort is part of keeping a fish. A successful trip should carry through to the food shared afterward. Using the catch well gives all those hours on the water an even better finish.

FAQs

How long should tuna sit on ice before you clean it?

About six to eight hours, or until the fish is chilled all the way through. Larger fish take longer, and a cold exterior doesn't mean the center is cold, so keep checking and topping off the ice.

How long does fresh tuna last in the refrigerator?

Keep fresh tuna at 40°F or below and cook or freeze it within one to two days. Patting the cuts dry helps quality but doesn't extend safe storage time.

How should I thaw vacuum-sealed tuna?

Take the tuna out of the vacuum packaging first, then thaw it in the refrigerator. Removing the packaging before thawing is an important food safety step.