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Many Americans still think bright red tuna means it's fresher (it's not)
You know the tuna I’m talking about. It’s easy to mistake for a cube of watermelon. It’s the color of a Lyft logo. Appears to be glowing a vibrant, tantalizing purity. Tuna that bright red or pink means it’s… what, extremely fresh? Bursting with nutrients?
Nope. It means it’s got carbon monoxide.
I thought this was widely known, but a chef recently told me very few of his staff members were aware of this, and almost none of his customers. So, especially with the recent proliferation of poke joints, I thought I’d be helpful with this PSA of sorts.
Bright red or pink tuna means it has been gassed. In its natural state, fresh tuna is dark red, almost maroon, sometimes even chocolatey-looking.
Don’t worry, you most likely will have no ill effects from eating gassed tuna, according to the FDA. They have deemed carbon monoxided tuna as GRAS (Generally Regarded As Safe), though the practice is banned in Japan, Canada, and the EU. Plus, there is carbon monoxide in barbecue (given off by wood smoke).
But here’s why I personally tend to back away when I see bright red or pink tuna:
1. IT’S MUCH HARDER TO TELL IF IT’S FRESH OR NOT.
It can be left out for days and it will not turn brown. In one study, the University of Florida found that carbon monoxided tuna kept its bright red color for 11 days in the fridge. “The carbon monoxide actually hides the quality of a fish,” says Tommy Gomes, fifth-generation San Diego fisherman, host of The Fishmonger on Outdoor Channel, and owner of seafood shop Tunaville in Point Loma. “It’ll make a poor-quality fish pretty like a rose. I’ve seen them take an old piece of brown tuna [and] put the gas on it, and it comes out looking like cherry lemonade.” The gas also masks the smell of old tuna (which is one way you can tell if tuna’s getting past its eat-by stage). “Since there’s no smell, it falsifies the freshness,” Gomes explains.
2. I TRUST GOVERNMENT HEALTH ORGANIZATIONS, BUT ALSO RECOGNIZE THEY’RE NOT PERFECT.
The 1992 USDA food pyramid suggested carbs should be the bulk of our diet (they corrected that in 2005 and 2011). The government approved the fat substitute Olestra, which gave people all sorts of tummy issues. Margarine and other trans fats were also approved, then banned in May 2019. There are some smart humans in the government, but even geniuses make mistakes. So I tend to go with my gut: tuna in its natural state, or tuna treated with carbon monoxide? Easy choice.
So why gas tuna at all? Because of us. Consumers don’t like brownish fish. Tuna oxidizes quickly. It’s difficult for tuna fishermen and women to get it to market quick enough before it turns that brownish or chocolatey color. Customers erroneously think all brownish-looking fish is old or bad and will pay more for “fresher-looking” fish. So in the 1990s, the FDA allowed companies to gas the tuna and keep it artificially bright red for long stretches at a time.
“There’s nothing wrong with a hot chocolate–looking tuna loin,” says Gomes. “But, here in America, we want [it] seared on the outside, rosy pink on the inside.”

Gassed tuna is also often imported and less inexpensive than fresh, un-gassed tuna, says Gomes. “So, to be fair and honest,” Gomes acknowledges, “for families on a budget, gassed tuna is one of the best alternatives out there for frozen seafood.”
In the New York Times article cited above, a sushi restaurant owner reported his sales of tuna tripled when he started using gassed tuna. So that’s obviously good for the small business owner, as well as grocery stores. Food waste is a massive epidemic—the US throws out about half of edible seafood. If gassed tuna gets Americans to eat perfectly edible tuna they otherwise might throw out, that’s a step in a good direction.

But it’d be better if we as consumers knew that fresh, non-gassed tuna is supposed to be dark red or maroon—not bright red or watermelon pink, like a majority of the tuna I’ve seen at local poke shops. Ideally, we would look at a piece of bright red/pink tuna and think “Oh, hey there, carbon monoxide.”
The most important things about buying tuna is to trust the source (whether grocery store, fishmonger, or sushi joint). It also should be shiny and somewhat translucent, and not have slime or an off-smell.
Long live maroon tuna.
Troy Johnson is the magazine’s award-winning food writer and humorist, and a long-standing expert on Food Network. His work has been featured on NatGeo, Travel Channel, NPR, and in Food Matters, a textbook of the best American food writing.
ArtsConnect brings those experiences into view, helping residents discover what they can see, hear and create at UC San Diego while experiencing the campus in a new way.
Ask most people what UC San Diego is known for, and the arts may not be the first answer. Yet this fall, San Diegans can watch Ghostbusters with a live orchestra, try their hand at glassmaking and wander among more than 20 works of public art woven throughout the university’s La Jolla campus.
ArtsConnect brings those experiences into view, helping residents discover what they can see, hear and create at UC San Diego while experiencing the campus in a new way.

“The arts are at the heart of UC San Diego’s student-centered mission and vision,” says Alysson Satterlund, Vice Chancellor for Student Affairs and Campus Life. “Whether creating, participating in, or experiencing performances, the arts are essential to a healthy and truly fun Triton student experience.”
That invitation often begins where the arts intersect with other fields.
“Some of the most innovative work and discovery happen where disciplines don’t usually share a stage,” says Cristina Della Coletta, Dean of the UC San Diego School of Arts and Humanities. “So through our unique intersection of the arts with science, technology, and medicine, we are improving lives, physically and emotionally.
Take The Inaudible Ocean, a collaboration between Department of Music Professor Lei Liang and Scripps Institution of Oceanography Assistant Project Scientist Josh Jones. Over eight years, the pair recorded earthquakes, ship noise, whale songs and other sounds in remote underwater locations. They transformed those recordings into a live music experience that allowed audiences to hear the ocean in an entirely new way. The work premiered on campus in May and continues to evolve.
The arts also connect the campus to the global art world and diverse perspectives. Chief Campus Curator Jessica Berlanga Taylor recently curated the Mexico Pavilion at the 61st Venice Biennale, featuring RojoNegro, the collective formed by Noé Martínez and María Sosa. The collective will unveil a compelling new permanent installation for UC San Diego’s celebrated Stuart Collection later this fall.

ArtPower offers another easy entry point, bringing touring performers to venues including the outdoor Epstein Family Amphitheater and the intimate Loft. The nearly three dozen performances featured through its 2026-2027 season span music, dance, film, theater and conversation.
Among the fall highlights is Ghostbusters in Concert on Sept. 25, pairing the beloved 1984 film with a live performance of Elmer Bernstein’s score. Tickets start at $35, and the amphitheater is located next to the UC San Diego Blue Line trolley station.
“Every member of our community should have access to world-class art, so we work hard to remove the barriers that stand in the way,” says Colleen Kollar Smith, executive artistic director of the Campus Performances and Events Office. “That means affordable ticket prices, and performances, voices and experiences where people see themselves reflected on stage and know they belong.”
The arts at UC San Diego are not only something to watch. The Craft Center offers public classes and workshops in ceramics, jewelry, woodworking, culinary arts and even surfboard shaping. At the new Glass Center, beginners and experienced makers can explore glassmaking through classes, demonstrations and studio experiences.
Whether you want to attend a performance, make something yourself or spend an afternoon exploring public art, there is an easy way in. And the invitation extends well beyond students and alumni.
Kollar Smith says it best: “Visit, participate, spectate or create. You’re invited, and we hope you’ll connect with us soon.”
Explore upcoming experiences at ucsd.edu/artsconnect.
Laika Nur, MD, takes her love of volleyball from the court to the clinic as team physician for the San Diego Mojo
Growing up, Laika Nur, MD, Scripps Clinic sports medicine specialist, loved watching beach volleyball when the Association of Volleyball Professionals tour came to her hometown of Chicago. A talented volleyball player herself, she remembers sitting in the stands all day, and once, even got a couple autographs. Years later, Dr. Nur was attending a professional event focused on women’s sports, and the discussion turned to a new professional women’s volleyball league. The general manager and coaching staff for San Diego’s team, the Mojo, happened to be in attendance, and Dr. Nur took the opportunity to ask them if they needed a team doctor. Flash forward to the Mojo’s inaugural 2024 season, when Dr. Nur officially became the team physician. Click here to read more about Dr. Nur and how she incorporates lessons she learned on the court into her practice.
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