The happy fish baby pillow, like any other pillow, is not recommended for infants under one year old. It is important to follow safe sleep guidelines for infants, which advise placing babies on their backs on a firm, flat surface without any loose bedding or pillows. Pillows, including the happy fish baby pillow, can pose a suffocation hazard for young babies. Once your child is older and able to roll over and move independently, you can introduce a pillow for added support and comfort. Always prioritize safety when it comes to your baby's sleep environment.