Based on the information gathered from multiple reliable sources (Healthline, The Baby Dietitian, and the CDC), here is a comprehensive guide to the types of fish a nine-month-old infant can eat. ### **Safe Fish for a 9-Month-Old (Low-Mercury Options)** These fish are recommended because they are low in mercury and high in nutrients like omega-3 fatty acids (DHA), which support brain development: * **Salmon** (wild-caught is often recommended) * **Cod** * **Pollock** * **Haddock** * **Trout** * **Herring** * **Sardines** (canned in water or olive oil, with no added salt) * **Tilapia** * **Flounder** or **Sole** * **Canned light tuna** (in water, with no added salt) * **Anchovies** ### **Fish to Limit or Avoid (High-Mercury Options)** The CDC and FDA advise avoiding these fish entirely for young children due to high mercury levels, which can harm the developing brain and nervous system: * **King Mackerel** * **Marlin** * **Orange Roughy** * **Shark** * **Swordfish** * **Tilefish** (from the Gulf of Mexico) * **Bigeye Tuna** ### **Important Preparation and Safety Tips** 1. **Cook Thoroughly:** Fish should be cooked to an internal temperature of 145°F (62.8°C). It should be opaque and flake easily with a fork. 2. **Debone and Skin:** Always remove all bones and skin to prevent choking. For a 9-month-old, the fish should be mashed, flaked, or cut into very small, soft pieces. 3. **Introduce as a New Food:** Fish is a common allergen. Introduce it on its own (without other new foods) to watch for any allergic reaction. 4. **Serving Size:** A good starting serving size is about 1 ounce (roughly the size of your thumb). 5. **Frequency:** The American Academy of Pediatrics recommends offering low-mercury fish **1 to 2 times per week**. 6. **Avoid Raw Fish:** Do not give a baby raw fish (like sushi or sashimi) due to the risk of bacteria and parasites. **In summary:** A nine-month-old can safely eat a variety of low-mercury, well-cooked, and thoroughly deboned fish like salmon, cod, and sardines. Always avoid high-mercury species and introduce fish carefully to monitor for allergies.