Prep warning
Cook flounder fully, never raw or seared. It is one of the lower-mercury fish, which makes it a common early choice. Fish is a major allergen, so offer it on its own the first few times and watch for a reaction.
Choking notes
Thin bones are the main risk. Flounder fillets can hide fine bones, so run your fingers through the cooked flesh every time and remove them all before serving.
How to serve by age
6-9 months
Flounder is a mild white fish and one of the lower-mercury options. Cook it through until it flakes easily, then run your fingers through the flesh to remove every thin bone. Flake it small and mash it smooth, or fold it into a purée. Offer it on its own at first.
Pea-size flakes, checked by hand for bones, or smooth purée.
9-12 months
Serve soft flounder flakes as a finger food once your baby grasps small pieces. The flesh is naturally tender, so it breaks into easy gummable pieces. Cook it through and check for thin bones each time.
Small soft flakes or thin strips, all bones removed.
12-18 months
Flaked flounder works as table food now. Bake, steam or pan-cook it through, season lightly without salt, and keep removing any thin bones. Its mild taste pairs well with vegetables and grains.
Bite-size flakes, bones removed.
Key nutrients
Allergen information
Fish is a common allergen. Read Fish guidance
Common questions
When can my baby eat Flounder?
Most babies can try Flounder from around 6 months, once they show signs of readiness. Check the prep and cut-size notes above before you start.
General informational content, not medical advice. Always consult your pediatrician about introducing new foods, especially if your baby has any medical conditions or family history of allergies.
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