Babies can be introduced to fish eggs after 6 months of age, as long as they have already been introduced to solid foods and are not allergic to fish. However, it is recommended to speak with a pediatrician before introducing fish eggs to a baby's diet, as fish can contain high levels of mercury and other contaminants. When introducing fish eggs to a baby, it's best to start with a small amount and to cook them thoroughly to reduce the risk of foodborne illness. Soft-boiled or scrambled eggs are a good option for babies who are just starting to eat solid foods.