Koi goldfish are becoming very popular among pond owners these days. But what are these large fish? Giant goldfish? Not quite, I just like to call them koi goldfish for easy recognition.
The Japanese first developed Koi over 200 years ago, calling them Nishikigoi. These highly decorative fish are the perfect addition to a lushly landscaped outdoor pond.
They are quite large fish, especially in comparison to other fish that you’d normally keep. Koi goldfish can grow from 24 to 36 inches. Therefore, you’ll need to make sure that you have a good sized pond, with proper aeration, and good feeding habits. This will ensure that your fish can properly grow to its full length. In a backyard pond, this can mean 2 to 4 inches of growth every year!
While there have been Koi goldfish that have lived over 200 years, the average life span of a Koi is usually closer to between 25 and 35 years.
Koi can go for about 10 days – sometimes more – without food, without suffering any harm, however, for humane reasons, and to ensure proper growth, you’ll want to feed your Koi goldfish once or twice per day (depending on the season).
Though Koi goldfish are known to eat just about anything, there are pellets made specifically for Koi that ensure good health. You can also feed them dried or fresh shrimp, lettuce, cooked rice, and cooked oats.
Koi goldfish can live in a wide range of temperatures, but it’s not good for them to endure sudden changes in temperature. As long as the water doesn’t freeze solid, Koi are able to survive under ice and in extreme cold. In such temperatures, the koi won’t eat or move around very much.
Koi goldfish lay thousands of eggs in a single breeding, and won’t be able to breed until they are 3 to 4 years old and of sufficient size. If eggs and baby Koi aren’t kept separate from the adults, they’re likely to be eaten before they can grow. Koi has a less than 50% survival rate from birth.
Raising Koi goldfish can be relaxing and interesting as a hobby.