Can You Eat Marlin When Pregnant?
Written by Jordan Morley · Reviewed against NHS foods-to-avoid guidance · Last updated 28 October 2026
No — the NHS says to avoid Marlin completely during pregnancy because it contains high levels of mercury.
Why is marlin a concern in pregnancy?
Marlin is a large, long-lived predatory fish and contains more mercury than most other fish. Too much mercury can affect the development of your baby's nervous system, which is why the NHS advises avoiding Marlin entirely while pregnant or trying for a baby.
You can also check the calorie content of marlin alongside its safety information. Also check medication safety during pregnancy if you're managing any conditions.
The exception
Marlin isn't common on UK/US sushi menus, but it's worth asking about specifically if you see an unfamiliar specialty roll — mercury isn't affected by raw prep, freezing or cooking. See our sushi safety guide for lower-mercury picks.
Safe swaps
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Check Price →Marlin: the other answers on this site
| Question | Short answer (links to the full page) |
|---|---|
| While breastfeeding | Limit — max 1 portion a week |
Common questions
Can I eat marlin in the first trimester?
Yes — the advice to avoid Marlin applies to all of pregnancy, and mercury exposure in the first trimester is particularly worth avoiding as the nervous system is forming.
Is a small amount of marlin OK during pregnancy?
The NHS advises avoiding Marlin altogether during pregnancy rather than limiting it.
I accidentally ate marlin while pregnant — what should I do?
A single portion is very unlikely to cause any harm — the concern is repeated exposure over time. Simply avoid it for the rest of your pregnancy and mention it to your midwife if you're worried.
Is cooked marlin safe in pregnancy?
Cooking does not remove mercury, so Marlin should be avoided during pregnancy whether cooked or not.
Related answers
Primary source: NHS foods-to-avoid guidance.
General information only, not medical advice: see the medical disclaimer. Feeling unwell after eating something? Contact NHS 111 or your GP.