Koi fish will not recognize their owners when raised. The brains of fish are not particularly developed. Their IQs are very low. They are not as smart as mammals. They cannot recognize their owners. No matter how long they are kept, they will never be like cats. Dogs also recognize their owners, but they can recognize their owners through hearing and ask for food from their owners.

Notes on raising koi carp

1. Although koi carps have a gentle personality, they can jump out of the tank. Once it jumps out and is not retrieved in time, it will dehydrate and die. Therefore, when raising koi, you must add a cover to prevent the fish from jumping into the tank.

2. Koi is an omnivorous fish and should choose a variety of feeds when feeding. Synthetic artificial feed can be fed, which has relatively high nutritional content and is made according to the needs of fish. You can also feed some animal feed such as live bait to supplement protein. When feeding koi, feed in small amounts and multiple times to ensure that they finish eating within ten minutes. Excess feed will pollute the water quality, breed a large number of bacteria, and make fish sick.

3. The new water for koi must be replaced with tap water that has been dried. There is residual chlorine in tap water. Drying can effectively remove the residual chlorine. The density of water changes should be determined based on the deterioration of water quality and the density of fish. Usually twice a week or once a week. The amount of water changed is generally one-quarter or one-fifth of the entire water body. It depends on the specific situation.