- The goldfish will spit out food.
- The goldfish will stop swimming and may appear lethargic.
- The goldfish's belly may appear swollen or bloated.
- The goldfish may start to swim erratically or may lose its balance.
If you notice any of these signs, it is important to stop feeding the goldfish immediately. Overfeeding can lead to a number of health problems, including obesity, swim bladder disease, and constipation.