Yes, seafood can fit into a healthy pregnancy diet when you choose low-mercury fish and keep portions to 8–12 ounces per week.
Fish and shellfish bring DHA and iodine for growth. The flip side is mercury, raw items, and storage mistakes. This guide shows what to buy, how much to eat per week, which species to skip, and simple kitchen rules that keep meals safe.
Safe Seafood During Pregnancy: Weekly Portions
Health agencies encourage eating fish while expecting, with smart picks and limits. Aim for two to three seafood meals a week, using a four-ounce cooked portion as the usual adult serving. Mix species so your plate never leans on a single fish.
| Category | Serving Guidance | Notes |
|---|---|---|
| Best Choices | 2–3 servings weekly | Salmon, sardines, shrimp, pollock, trout, tilapia, cod, catfish |
| Good Choices | 1 serving in a week (no other fish that week) | Albacore tuna, halibut, mahi-mahi, snapper |
| Choices To Avoid | Skip during pregnancy | Shark, swordfish, king mackerel, tilefish from Gulf of Mexico, marlin, orange roughy, bigeye tuna |
Why Fish Belongs On The Plate
Seafood offers omega-3s, with DHA in the spotlight for brain and eye growth. Many species also bring iodine for thyroid function, plus vitamin D and iron. People who eat the suggested weekly amount during pregnancy tend to meet more of these nutrients through food, not pills.
Mercury matters, yet the answer is balance, not blanket avoidance. Choosing species on the low end and sticking to the weekly range lets you gain benefits while keeping exposure in check.
Fish To Limit Or Skip While Pregnant
Some species carry more mercury because they live longer and feed on other fish. Keep these rules in mind:
- Avoid high-mercury fish: shark, swordfish, king mackerel, tilefish from the Gulf of Mexico, marlin, orange roughy, bigeye tuna.
- Limit “good choice” fish to one serving in a week: albacore (white) tuna, halibut, Chilean sea bass, grouper, and similar mid-level species.
- Raw items are off the list: skip raw sushi, sashimi, ceviche, and oysters. Choose cooked rolls or fully cooked shellfish.
- Refrigerated smoked fish needs heat: lox or “nova-style” fish is only safe when cooked in a dish; shelf-stable canned smoked fish is fine.
How Much Seafood Per Week Is Right?
Use this simple pattern: two to three meals from the “best” list, or one meal from the “good” list with no other fish that week. A palm-size four-ounce portion works for most adults. If your appetite is smaller, serve two to three ounces and add an extra meal the next week.
Tinned fish can make this easy. Canned salmon or sardines sit in the “best” group and are budget-friendly. Canned light tuna also stays in the “best” lane; albacore belongs to the “good” lane and is a once-in-a-week pick at most. For the official serving rules and species chart, see the FDA/EPA advice about eating fish.
Store And Prep Seafood The Safe Way
Food safety keeps you and the baby out of harm’s way. Follow these steps from shop to plate:
- Buy cold. Grab seafood last, keep it on ice during the trip home, and refrigerate within two hours.
- Cook to the right temperature. Fish reaches 145°F when it flakes and looks opaque; cook shrimp, mussels, and clams until flesh turns opaque and shells open.
- Reheat ready-to-eat items. Heat deli-style fish spreads and refrigerated smoked fish in a casserole until steaming.
- Avoid cross-contact. Use separate boards for raw seafood and ready foods. Wash hands, knives, and counters with hot, soapy water.
- Chill leftovers fast. Refrigerate within two hours; eat cooked seafood within three days, or freeze for longer storage.
Tuna, Sushi, And Shellfish: What’s Okay?
Tuna: Skip bigeye. Canned light tuna fits into the “best” group; two to three servings across the week works. Albacore is higher in mercury, so keep it to a single serving and choose no other fish that same week.
Sushi: Choose rolls with cooked fish or vegetables, or tempura items served hot. Raw fish, sashimi, and ceviche wait until after delivery.
Shellfish: Shrimp, crab, scallops, mussels, clams, and oysters are fine when fully cooked. Discard any bivalves that do not open during cooking.
Picking Low-Mercury Options At The Store
Use a short list for quick decisions:
- Great weekly staples: salmon (wild or farmed), trout, sardines, pollock, cod, haddock, tilapia, shrimp, crab.
- Occasional picks: albacore tuna, halibut, mahi-mahi, snapper.
- Skip entirely during pregnancy: king mackerel, marlin, bigeye tuna, shark, swordfish, tilefish from the Gulf of Mexico, orange roughy.
If you fish locally, check state advisories, trim skin and fat, and keep portions modest. When no advisory exists, limit to one serving and skip other fish for that week.
Simple Meals That Hit The Target
Here are easy ways to meet the weekly range without fuss:
- Two salmon dinners with roasted potatoes and greens.
- One shrimp stir-fry over rice plus a tuna sandwich made with canned light tuna.
- Fish tacos using pollock or cod, topped with cabbage and yogurt-lime sauce.
- Oven-baked trout with lemon, plus sardines on whole-grain toast at lunch.
Supplements, Omega-3s, And Prenatal Choices
Food should carry most of your omega-3 intake. If you use a prenatal that includes DHA, it can help you close gaps on days when fish is off the menu. Algae-based DHA works for people who do not eat fish. Always read the label and speak with your care team about any pill choice, dosing, and fit with your health history.
Travel, Takeout, And Dining Out
Restaurant menus can work well with a few quick checks. Pick cooked fish dishes and ask the server to confirm doneness. Skip raw oysters, cold smoked fish, and undercooked sushi. Keep hot foods hot during transport; refrigerate leftovers inside two hours.
Buying Checklist At The Fish Counter
Fresh fish should smell like the ocean, not sour. Flesh springs back when pressed, eyes look clear, and fillets look moist, not slimy. Frozen fish is a smart pick as well; quality stays steady and portioning is easy. Now.
Scan labels. Farmed and wild salmon both fit the weekly plan. If a package says “previously frozen,” cook it soon after purchase. For smoked fish sold in the fridge case, plan to bake it into a hot dish to make it safe.
Mercury, Benefits, And The Real-World Middle Ground
People often hear warnings about mercury and stop eating fish altogether. That choice cuts off DHA, iodine, and high-quality protein during a time when every bite counts. The middle path works better: lean on low-mercury staples, spread portions across the week, and vary species. That pattern matches the federal fish chart and keeps exposure beneath the level used in risk models.
Want the official serving rules and species lists in one place? Use the FDA/EPA fish advice, which sets the weekly range at 8–12 ounces and places canned light tuna in the “best” lane while putting albacore in the “good” lane. Read it here: FDA/EPA advice about eating fish.
If You Don’t Eat Fish
Some readers pass on seafood due to taste, faith, or access. You can still build a steady supply of omega-3s by adding a prenatal with DHA or an algae-based DHA softgel. Plant sources like walnuts and flax bring ALA, yet only a small share converts to DHA. A pill can bridge the gap, and your diet can carry the rest with eggs labeled “DHA,” dairy, and greens.
Talk with your clinician before adding a new supplement, especially if you take blood thinners or have a bleeding disorder.
Label Terms, Decoded
Sustainably caught: relates to fishing practices, not mercury or safety. Choose your portion based on the health guidance above, then weigh eco labels based on your values.
Seafood During Pregnancy: Quick Decision Tree
Use this tight checklist when you stand in the aisle or scan a menu:
- Is the fish on the low-mercury list? If yes, plan for two to three weekly servings. If it sits in the mid-range, limit to one serving and skip other fish that week.
- Will it be fully cooked? If not, pick another dish.
- Do you already have tuna that week? If you choose albacore today, keep it to one serving and choose no other fish.
Food Safety Pitfalls To Watch
Cold-smoked items kept in the refrigerator case can carry listeria. Bake them in a hot dish or use canned versions instead. See the CDC’s clear list of safer seafood choices, cooking temps, and items to avoid during pregnancy: CDC seafood guidance for pregnancy.
Food Safety Reference Table
Clip this chart near the fridge as a quick safeguard.
| Item | Safe Action | Storage Guide |
|---|---|---|
| Fish fillets/steaks | Cook to 145°F until opaque and flaky | Refrigerate 1–2 days raw; 3 days cooked |
| Shrimp/crab/scallops | Cook until flesh turns opaque | Refrigerate 1–2 days raw; 3 days cooked |
| Mussels/clams/oysters | Cook until shells open; discard any that stay closed | Cook the day of purchase for best quality |
| Refrigerated smoked fish | Only eat if heated in a cooked dish | Keep cold; use by date; freeze for longer |
| Canned fish | Ready to eat | Shelf-stable unopened; refrigerate after opening |
Method And Sources
This guide aligns with federal fish advice that sets weekly portions at 8–12 ounces from low-mercury species, and with food safety steps on cooking temps and ready-to-eat items. For the detailed fish chart and serving rules, see the FDA/EPA advice page. For listeria-related seafood rules and safer choices, see the CDC guidance for pregnancy.