Branzino is safe to eat during pregnancy when cooked thoroughly. It’s a low-mercury white fish with a mild flavor, making it one of the better seafood options for expectant mothers. The key considerations are mercury levels, how much you eat per week, and how it’s prepared.
Mercury Levels in Branzino
Branzino, also called European sea bass, falls into a low-to-moderate mercury range. The FDA groups it with saltwater bass varieties, which have a mean mercury concentration of 0.167 parts per million. For context, high-mercury fish like swordfish and king mackerel typically measure above 0.7 ppm, while very low-mercury options like salmon and sardines sit below 0.05 ppm. Branzino lands comfortably in the safer portion of the spectrum.
The median mercury level for this group is even lower at 0.094 ppm, meaning most individual fish tested well below the average. Some samples showed no detectable mercury at all. This makes branzino a reasonable choice throughout pregnancy, though it’s not quite as low in mercury as options like shrimp, tilapia, or pollock.
How Much You Can Eat Per Week
The FDA and EPA recommend that pregnant women eat 2 to 3 servings of lower-mercury fish per week, with a serving being about 4 ounces cooked. Branzino fits within this guideline. Eating it two or three times a week alongside other low-mercury fish is perfectly fine, and doing so helps you get the omega-3 fatty acids and protein that support fetal brain and eye development.
If branzino is the only fish you’re eating, staying within that 2 to 3 serving range keeps your mercury exposure well below concerning levels. If you’re mixing in other fish during the same week, just be mindful of the total. Avoid pairing branzino with higher-mercury species like tuna steaks, halibut, or Chilean sea bass (a different fish despite the similar name) in the same week.
Nutritional Value During Pregnancy
Branzino is a lean white fish that provides about 19 grams of protein per 100-gram serving. Protein needs increase during pregnancy, and fish is one of the most digestible sources. Branzino also supplies omega-3 fatty acids, which play a direct role in your baby’s nervous system development, particularly during the second and third trimesters when brain growth accelerates.
Its mild, slightly sweet flavor and low oil content make it easier to tolerate than stronger-tasting fish, which can be a real advantage during the first trimester when food aversions are common.
Farmed vs. Wild Branzino
Most branzino sold in the U.S. is farmed, primarily from Mediterranean aquaculture operations. One consideration with farmed branzino is PCB contamination. Farmed fish can carry higher PCB levels than wild-caught fish because of their feed and their higher body fat content. Research on Italian farmed sea bass found that PCB levels varied significantly depending on the farming method. Fish raised in extensive coastal lagoons had different contamination profiles than those from intensive inland tanks or sea cages.
That said, PCB levels in farmed branzino generally remain within safety limits set by food regulators. If you want to minimize exposure, choosing fish from reputable sources and varying the types of fish you eat throughout the week is the most practical approach. You don’t need to avoid farmed branzino, but eating a variety of seafood rather than the same fish repeatedly helps spread out any trace contaminant exposure.
How to Prepare Branzino Safely
The single most important safety rule is cooking temperature. All fish served during pregnancy should reach an internal temperature of 145°F (63°C). At that temperature, harmful bacteria like Listeria and any parasites present in the flesh are killed. Use an instant-read thermometer inserted into the thickest part of the fillet to check.
Without a thermometer, branzino is done when the flesh is opaque throughout and flakes easily with a fork. If any translucent or glossy sections remain near the center, it needs more time.
Raw or undercooked branzino is not safe during pregnancy. This includes crudo, carpaccio, or any preparation where the fish isn’t fully cooked. Pregnancy suppresses parts of your immune system, making you significantly more vulnerable to foodborne pathogens like Listeria, which can cross the placenta and cause serious complications including miscarriage, stillbirth, or preterm delivery. Smoked branzino that hasn’t been heated to 145°F also falls into this category and should be avoided.
Baking, grilling, pan-searing, and steaming are all safe cooking methods. Branzino roasted whole is one of the most popular preparations, and it works well because the bones help conduct heat evenly through the flesh.