How long do Koi fish stay pregnant ?

Answer 1

Right up to the point that they give birth.

Answer 2

The female koi throws her eggs usually in the spring - here in northern Utah, usually around May or whenever the water hits about 65-70 degrees. It seems like the first big water change of the year induces spawning. The boys will chase the girl around the pond, swimming up underneath her and trying to almost push her out of the pond, it seems. Then she'll make a sharp turn and throw the back of her body/tail up towards the water's surface, and generally by a plant or some other structure in the water. The boys will mimic this behavior at the same time and release their milt to fertilize the eggs (warning: your pond will smell terrible and be really foamy - your ammonia levels will soar, too!). The eggs are very sticky and will almost glue themselves onto whatever they touch. The fish also think they are a very tasty treat and unless you remove/seperate the grown up fishies from the eggs, they will pick them clean and eat every last one of them. If you can separate the eggs and get them away from the rest of the fish, do so. Then, keep the eggs in highly oxygenated water for the next week or so (depends on temperatures - longer if colder, shorter if warmer) and you should see some little baby koi fry swimming around in no time!

Answer 3

They dont stay pregnant they lay eggs.....

Like most fish, Koi reproduce through spawning in which a female lays a vast number of eggs and one or more males fertilize them. Nurturing the resulting offspring (referred to as fry) is a tricky and tedious job, usually done only by professionals. Although a Koi breeder may carefully select the parents they wish based on their desired characteristics, the resulting fry will nonetheless exhibit a wide range of color and quality.

Unlike a purebred dog or cat, even the finest champion-grade koi will produce literally thousands of unacceptable, unrecognizable, or even genetically defective offspring in a single spawning. These (and hundreds of marginal offspring) are culled at various stages based on the breeder's expert eye and closely guarded techniques known to a rare few outside Japan. Culled fry are usually destroyed (perhaps fed to other fish) and older culls are often sold as lower-grade "pond-quality" koi within their first year (also called "Tosai") at 3"–6" in size. The semi-randomized result of the Koi's reproductive process is both a blessing and a curse. While it requires diligent oversight to narrow down the favorable result that the breeder wanted all-along, it also made possible the gradual transformation of wild river carp into the exquisite art form that we see in modern nishikigoi.

Answer 4

Koi and goldish can survive for weeks under ice as long as the pond is big and deep enough. They go into a state of semi-hibernation due to the cold water. They dont eat anything and dont need much oxygen. As it sounds like iced over ponds is not a common occurance in your area the ice shouldn't last very long. Your fish will be fine. I have had my goldfish pond ice over for several days and didn't loose any fish. Ian

Answer 5

They spawn eggs. Usually in the spring as the water warms up.

Answer 6

they are not pregnant, they fill with eggs in the spring and spawn

Answer 7

I thought fish laid eggs... with the exception of a few species, such as sharks.