Saltwater fish are the safest choice for eating raw. Tuna, yellowtail, salmon, halibut, red snapper, and albacore are among the most popular species served as sushi and sashimi worldwide. But the species alone doesn’t determine safety. How the fish was handled, whether it was frozen properly, and how fresh it is all matter just as much as what’s on the label.
Best Saltwater Fish for Eating Raw
The general rule is simple: stick to saltwater fish. Tuna (maguro) is the most widely consumed raw fish in the world and comes in several varieties. Skipjack and yellowfin are lower in mercury and considered “best” and “good” choices by the FDA, respectively. Bigeye tuna, on the other hand, is one the FDA recommends avoiding due to high mercury levels.
Yellowtail (hamachi) is a staple of Japanese sashimi, prized for its buttery texture and mild flavor. Halibut, red snapper (tai), and albacore tuna are also traditional sashimi fish. Mackerel appears on many sashimi menus, though its strong flavor isn’t for everyone, and it carries a higher risk of scombroid poisoning if not kept cold (more on that below).
Salmon deserves special mention. Wild-caught salmon can harbor visible parasites like roundworms, which is why sushi-grade salmon is almost always either farmed on pellet feed (which dramatically reduces parasite exposure) or frozen to specific standards before serving. If you’re buying salmon to eat raw at home, farmed Atlantic salmon is the lower-risk option.
Why Freshwater Fish Should Be Cooked
Freshwater fish like carp, catfish, trout, and snakehead carry parasites that saltwater species generally don’t. Chinese liver fluke is one of the most concerning. It can cause inflammation, blockages, and even cancer in the bile ducts of the liver. Freshwater fish can also carry bacteria like Group B streptococcus, which has caused outbreaks linked to raw freshwater fish consumption and can infect the bloodstream, lungs, bones, and joints.
There is no reliable way to make freshwater fish safe to eat raw at home. Cooking is the only consistent method to eliminate these risks.
How Freezing Makes Raw Fish Safer
Nearly all fish served raw at restaurants has been frozen first. This isn’t a shortcut; it’s a food safety requirement in many jurisdictions. The FDA specifies that freezing at -4°F (-20°C) for seven days, or at -31°F (-35°C) until solid and then holding for 15 hours, is enough to kill parasites. Commercial blast freezers reach these temperatures easily. A standard home freezer typically sits around 0°F, which may not be cold enough to meet these thresholds reliably.
This is why “sushi-grade” or “sashimi-grade” fish from a trusted fishmonger matters. Those labels aren’t regulated by the FDA, but reputable sellers use them to indicate the fish has been frozen to parasite-killing standards and handled with raw consumption in mind.
Fish That Carry Extra Risk
Some saltwater fish pose dangers that freezing can’t fix. Ciguatera toxin builds up in reef fish that feed on toxic algae, and it’s completely undetectable. The fish looks, smells, and tastes normal. Cooking, smoking, and freezing do nothing to destroy the toxin. The CDC specifically flags barracuda, moray eel, grouper, amberjack, sea bass, sturgeon, parrotfish, and surgeonfish as species to avoid or limit for this reason.
Scombroid poisoning is a separate concern tied to fish that are high in histidine, an amino acid that converts to histamine when the fish isn’t kept cold enough. Tuna, mackerel, mahi-mahi, sardines, anchovies, herring, bluefish, amberjack, and marlin are all susceptible. Cooking and freezing don’t neutralize histamine once it’s formed. The key prevention is strict temperature control from the moment the fish is caught. If raw tuna or mackerel smells unusually pungent or peppery, that’s a warning sign.
Raw Shellfish: A Different Category
Raw oysters are the riskiest commonly eaten raw seafood. Oysters filter large volumes of seawater and concentrate Vibrio bacteria in their tissues. Most Vibrio infections cause diarrhea and vomiting, but Vibrio vulnificus can be life-threatening. About one in five people with a Vibrio vulnificus infection die, sometimes within a day or two. You cannot tell a contaminated oyster from a safe one by appearance, smell, or taste, and lemon juice, hot sauce, and alcohol don’t kill the bacteria.
Raw clams, mussels, and scallops carry similar Vibrio risks. If you choose to eat raw shellfish, sourcing from reputable sellers who follow cold-chain handling is the only practical way to reduce (not eliminate) the danger.
Mercury Levels in Popular Raw Fish
Eating fish raw doesn’t change its mercury content, but people who eat sushi regularly should pay attention to which species they’re choosing. The FDA groups fish into three tiers. Skipjack tuna (the kind in most canned light tuna) is a “best choice” with lower mercury. Yellowfin tuna and albacore fall into the “good choices” category, meaning you should limit them to one serving per week if you’re pregnant or breastfeeding. Bigeye tuna has high enough mercury to land on the “choices to avoid” list entirely.
For most adults, two to three servings of lower-mercury fish per week is the general recommendation. Pregnant or breastfeeding women should aim for 8 to 12 ounces per week from lower-mercury options. Children need smaller portions scaled to their age, ranging from about one ounce per serving at age one to four ounces by age eleven.
Who Should Avoid Raw Fish Entirely
The EPA advises that pregnant women, young children, older adults, and anyone with a weakened immune system should not eat raw fish, partially cooked seafood, raw shellfish, or refrigerated smoked seafood (often labeled as lox, nova-style, or kippered). For these groups, the bacterial and parasitic risks outweigh the benefits, even with properly handled sushi-grade fish. Cooked seafood remains a safe and nutritious alternative.
Buying Fish to Eat Raw at Home
If you’re preparing raw fish at home, buy from a fishmonger or counter that explicitly sells sushi-grade or sashimi-grade fish. Ask whether the fish has been previously frozen to parasite-destruction standards. Whole Foods, some Costco locations, and specialty Japanese grocery stores commonly carry fish intended for raw consumption.
Keep the fish on ice during transport and refrigerate it immediately. Use it the same day you buy it. A sharp knife and a clean cutting board are obvious essentials, but so is keeping the fish cold throughout preparation. If the texture feels mushy, the color looks dull, or there’s a strong fishy odor, cook it instead.