Goldfish cannot recognize their owners. Goldfish have low IQs and short memories. They cannot remember their owners or understand their owners' behavior. They only form conditions for feeding and do not interact emotionally with their owners. Sometimes goldfish will swim with their owners. This does not mean that they recognize their owners, but that they are expecting to be fed.

Notes on raising goldfish:

1. The appetite of goldfish is very small. Feed a small amount of fish food twice a day. If you feed too much, the goldfish will not be able to eat it. It is easy to pollute the water quality and cause the goldfish to become sick.

2. The water in the fish tank needs to be changed regularly. When changing the water, be sure to change only half of the water each time to prevent the goldfish from not adapting to the new water quality.

3. Fish feces and fish food can easily pollute the water quality and cause fish diseases. In addition to changing the water regularly, you should pay more attention to observing fish scales and Look at the fish's eyes to see if the fish scales have fallen off and whether there are any abnormalities around the fish's eyes. If you find your fish are sick, sprinkle some sterilizing salt into the water.