When Can Babies Have Shellfish? Possible Benefits And Side Effects

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A shellfish is an aquatic creature with an exterior that resembles a shell and lives in freshwater and saltwater. When can babies eat shellfish–is a question many parents have. Although adding shellfish to a baby’s diet might be beneficial for their health, it can also trigger allergies since they can be contaminated with hazardous materials such as cadmium and mercury.

These creatures are divided into mollusks and crustaceans and are rich in micronutrients, protein, and healthy fats, which can help support a baby’s development and growth.

In this post, we tell you about the nutritional value of shellfish, when to introduce it to your baby, how to safely consume it, and points to consider when feeding it to your baby.

When Can Babies Eat Shellfish?

Offer well-cooked shellfish to babies older than six months in age

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Some experts suggest feeding well-cooked shellfish once the baby is older than six months and has started consuming other solids, such as cereals, grains, poultry, and meat. However, some recommend delaying it up to 9 to 12 months due to its potential to cause allergies (1).

Consult a pediatrician and know the right age to start feeding shellfish to your baby, especially if you have a family history of food allergies.

Nutritional Value Of Shellfish

The nutritional value varies across the types of shellfish (crustaceans and mollusks). The commonly consumed crustaceans are crab, crayfish, lobster, shrimp, krill, and prawn, while widely consumed mollusks are clams, scallops, oysters, and mussels (2).

Below is an approximate nutritional composition of various shellfish types (cooked) with a serving size of three ounces (85g) (3).

TypeCALORIES (KCAL)Protein (g)Fat (g)
Blue crab100201

Source: FDA

Possible Health Benefits Of Shellfish For Babies And Toddlers

Different shellfish have different health benefits. Some of the common ones are:

  1. Rich in high-quality protein: Shellfish like scallops, shrimp, and blue crab contain protein. Seafood protein is also a good source of digestible proteins, essential amino acids that are important for the development of babies (4).
Shellfish is rich in amino acids.

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  1. Abundant micronutrients: Moderate consumption of shellfish can supply micronutrients, such as vitamins B12 and D, sodium, potassium, copper, zinc, and iodine (2). These micronutrients help regulate several essential physiological functions, like physical and mental growth.
  1. Source of healthy fats: Polyunsaturated fatty acids (good fats), such as DHA and EPA, which are types of omega-3 fatty acids (2), a
  1. Immunostimulating properties: Shellfish contain carotenoids like astaxanthin, which has immunostimulating properties (2). It also has peptides, omega-3 fatty acids, vitamins A, D, B12, iron, copper, and zinc, which are considered beneficial for the immune system (5). Thus, regular consumption of shellfish may help boost immunity in the long run.
Shellfish can help improve the baby's immunity.

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Regular consumption of shellfish may have cardioprotective, anti-inflammatory, and antiviral benefits, as well.

Possible Side Effects Of Shellfish In Infants

Shellfish allergy in babies

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Just like any other food, shellfish has its share of potential side effects for babies.

  1. Foodborne illnesses: Raw and undercooked shellfish, mostly clams, oysters, and mussels, may contain viruses and bacteria that can lead to poisoning. Shellfish from contaminated water can contain dangerous pathogens, such as norovirus (6). Besides, contaminated shellfish may contain marine contaminants, such as harmful algal bloom (HAB) toxin and brevetoxin, which might be fatal for babies (7) (8).
  1. Chemical contamination: Lobsters, scallops, and crab can be prone to mercury contamination (9). Other shellfish can also be contaminated with lead and mercury, especially when harvested from polluted waters. High levels of mercury can adversely affect the central nervous system (10).
  1. Allergy: The allergic reaction to shellfish depends on the individual and the type of shellfish. Some of the common food allergy symptoms are wheezing, trouble breathing, coughing, diarrhea, stomach ache, red spots hives, and itchy, watery, swollen eyes. An extreme allergic reaction can cause anaphylaxis (11).

See a doctor promptly if you notice any allergy symptoms or if your baby seems unwell after consuming shellfish.

The best way to avoid these adverse effects is to follow FDA advisories on fish and shellfish selection, storage, and cooking.

Tips To Include Shellfish In Your Baby’s Diet

Shellfish broth for babies

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The following tips could help reduce the risk of adverse effects of shellfish consumption among babies.

  1. The American Academy of Pediatrics recommends serving an ounce (30g) of fish and shellfish, once or twice a week, to toddlers between two and three years of age (12). However, there is no clear recommendation available for babies. When introducing a new food, start with a small amount to minimize a potential allergic reaction. Therefore, consult your pediatrician on the right amount of shellfish consumption for your baby.
  1. Purchase shellfish from trusted sellers, preferably those approved by the government or the FDA. It can ensure that the shellfish contain no contaminant, such as mercury, or mercury is within the safe limits of human consumption.
  1. Never feed uncooked or under-cooked shellfish to a baby as it can increase the risk of food poisoning (13). The CDC states that seafood should be cooked to at least 145°F (63°C).
  1. Cook shellfish at home and do not feed shellfish bought from a restaurant. Do not feed any leftover cooked seafood to a baby. Cross-contamination from cooking utensils or cooks touching different foods occurs easily in restaurants.
  1. Introduce only one type of shellfish at a time. Follow a “three-to-five day wait” rule to check for allergic reactions.
  1. Feed small amounts, like half to one teaspoon at a time. It could help your baby to adjust to the taste, texture, and digestion of the food.
  1. Babies below the age of 12 months should be fed shellfish as puree, paste, or a mash. Toddlers over the age of 12 months can be served well-cooked small pieces of shellfish as finger food.

When can babies eat shellfish–you may introduce it along with other solid foods by six months, but it may be safer to start them by 12 months as the harmful effects of allergies if triggered, may be lesser by that age. Start with small portions of well-cooked shellfish and gradually include them as a part of a balanced diet for your baby. Shellfishes are good sources of proteins, micronutrients, and omega-3 fatty acids that may protect against inflammation and viral infections. Exercise caution while selecting, storing, and cooking shellfish to avoid contaminants and the risk of food poisoning.

Key Pointers

  • Pureed and mashed well-cooked shellfish can be fed to babies aged six months and more and have started eating solids meals.
  • Shellfish also has antiviral, anti-inflammatory, and cardioprotective effects.
  • Allergies and foodborne infections can be caused by eating raw, undercooked, or contaminated shellfish.
  • The CDC recommends seafood be cooked at a temperature of at least 145°F (63°C).


MomJunction's articles are written after analyzing the research works of expert authors and institutions. Our references consist of resources established by authorities in their respective fields. You can learn more about the authenticity of the information we present in our editorial policy.
1. Dawn Earnesty,Are there foods my baby should not eat?; Michigan State University
2. VazhiyilVenugopal and KumarapanickerGopakumar; Shellfish: Nutritive Value, Health Benefits, and Consumer Safety; Wiley Online Library
3. Seafood Nutrition Facts; U.S. Food And Drug Administration.
4. RyotaHosomi et al.,Seafood Consumption and Components for Health; CCSE
5. Faye M. Dong,The Nutritional Value of Shellfish; University of Washington
6. Foods That Can Cause Food Poisoning; CDC
7. Marine Environments; CDC
8. Case Definition: Brevetoxin; CDC
9. All About Shellfish; Winchester Hospital
10. EPA-FDA Advice about Eating Fish and Shellfish; EPA
11. Shellfish Allergy; John Hopkins All Children’s Hospital
12. Healthy Fish Choices for Kids; Healthy Children; AAP
13. Foods to avoid giving babies and young children; NHS
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Swati Patwal

Swati Patwal is a clinical nutritionist, a Certified Diabetes Educator (CDE) and a toddler mom with over eight years of experience in diverse fields of nutrition. She started her career as a CSR project coordinator for a healthy eating and active lifestyle project catering to school children. Then she worked as a nutrition faculty and clinical nutrition coach in different...
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Seeemaa Budhraja

Seeemaa Budhraja is a Delhi-based dietitian and nutritionist. She specializes in weight and lifestyle management. She is a healthy recipe designer, works as a health motivator and wellness coach as well. She has worked as a slimming head with one of the top organizations in India. She excels in therapeutic diets for various lifestyle-related diseases. This renowned nutritionist is a...
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