From the YummyYucky team, founded by Nancy Nash

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Can Babies Eat Bonito? How to Cook and Serve

Bonito is a small, meaty fish in the same family as tuna and mackerel. It is not listed by name on the FDA chart, but its relatives sit in the moderate mercury range, so it is best treated like tuna: an occasional food rather than a first fish. Buy it very fresh, and skip the salty dried flakes for now.

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When to introduce: 6 months+ (occasional)
Common allergen?: Yes - fish
Texture: Well cooked, flaked, boneless
Key nutrients: Protein, omega-3s, iron, vitamin B12

Bonito is a torpedo shaped fish related to tuna and mackerel, with darker, richer flesh than a mild white fish. Fresh, it can be grilled or poached, and dried and shaved it becomes the bonito flakes used to make Japanese dashi. For a baby, bonito is fine to meet eventually, but it is not the fish to start with. Its tuna family relatives carry moderate mercury, so it works best in small, occasional amounts once your baby is comfortable with gentler first fish.

Prep School: how to prepare bonito for baby-led weaning (BLW) and purées

🍴 Baby-led weaning

6 monthsNot a first fish. Once your baby has met a few gentle low mercury fish, cook fresh bonito to 158°F (70°C) on a food thermometer,⁴ or until it is opaque and flakes easily,³ remove any bones, and mash a small amount of the flaked flesh onto a loaded spoon. Keep servings small and occasional.

9 monthsOffer soft flaked pieces of well cooked bonito that your baby can pick up, checking for bones. Its flavor is strong, so pair it with a mild carbohydrate, and skip salty bonito flakes at this age.

12 months+Serve a small boneless portion of cooked bonito with vegetables and a little rice, keeping salt low. A light sprinkle of bonito flakes is fine occasionally now, but keep the whole fish an occasional food because of mercury.

🥄 Purées

6 monthsNot a first fish. After your baby has met a few gentle low mercury fish, cook fresh bonito to 158°F (70°C) on a food thermometer,⁴ or until it is opaque and flakes easily,³ debone it, and mash a small amount into a familiar puree. Keep servings small and occasional.

9 monthsMash well cooked bonito a little lumpier, or stir soft flakes through mashed vegetables and a mild grain. Skip salty bonito flakes at this age.

12 months+Spoon a small amount of flaked bonito through rice and soft vegetables, keeping salt low. A light sprinkle of bonito flakes is fine occasionally now, but keep the whole fish an occasional food because of mercury.

Is bonito safe? Choking & prep

Bonito is a small fish in the tuna and mackerel family. It is not named on the FDA and EPA chart, but its close relatives sit in the moderate mercury range, so it is sensible to treat bonito like tuna: an occasional food rather than a first fish or a daily one.¹ Start your baby on a low mercury Best Choices fish, and bring bonito in later and in small amounts. Two extra points matter with this family of fish. First, they spoil quickly and can cause a histamine, or scombroid, reaction if they are not kept very cold, so buy bonito very fresh and keep it chilled. Second, dried bonito flakes and bonito based dashi are salty, and babies under one should have very little added salt, so skip the flakes as a topping for now. Fish is a common allergen, so offer a small amount on its own the first time and watch for a reaction.² Cook fresh bonito to 158°F (70°C) on a food thermometer.⁴

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Nutrition

Bonito is rich in good quality protein and omega-3 fats, and its darker flesh brings iron, vitamin B12, niacin, and selenium. Those are genuinely useful nutrients for a baby, but because bonito sits in the moderate mercury group, it is better as an occasional source than an everyday one.

Goes well with

Rice · Mashed potato · Peas · Avocado · Cooked carrot

Storage & freezing

Fresh bonito is highly perishable and, like tuna, needs to be kept very cold to prevent histamine build up, so cook it the day you buy it. Refrigerate cooked leftovers in a sealed container and use within a day. Dried bonito flakes keep in a sealed package in the cupboard, but they are salty and not suited to babies under one.

More proteins to explore

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BranzinoAround 6 months

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Capelin6 months+

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CarpAround 6 months

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CatfishAround 6 months

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Brazil nut (ground)Around 6 months, ground or thinned only

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Breakfast sausageFrom about 12 months, as an occasional food

Introducing this allergen

Common questions

Is bonito safe for babies?

It is fine occasionally once your baby has started fish, but it is not a starter fish. Bonito is in the tuna family, which sits at moderate mercury, so keep it to small, infrequent servings and lead with lower mercury fish.

Can babies have bonito flakes or dashi?

Skip them for babies under one. Dried bonito flakes and bonito dashi are salty, and infants should have very little added salt. A light sprinkle can come in after the first birthday.

Why does bonito need to be so fresh?

Fish in the tuna and mackerel family can build up histamine and cause a scombroid reaction if they warm up. Buying very fresh bonito and keeping it cold the whole way home lowers that risk.

Sources

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Last updated September 2026. Next review December 2026. How we write these: built from current published guidance from the AAP, CDC, FDA/EPA, NIAID, WHO, and other pediatric and public-health authorities, with sources cited on the page. See our editorial and medical policy for how we research, source, and update these, and how we double-check the food advice.

This is general information, not medical advice, and is not individualized for your baby. Always talk to your pediatrician about your baby's diet, introducing allergens, and any reaction. In an emergency, contact emergency services.

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