i have gold fishes and koi some of the fishes have grown very large whats the problem with it?

i have gold fishes and koi some of the fishes have grown very large whats the problem with it i realy dont know whats going on tell me what you think please
Answers:
if the scales are poping out then the fish is going to die of disease. or the fish is full of eggs.

just do regular water changes every one or two weeks from now on

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We have Koi and Goldfish also. no Problem, the KOI will grow large based on the Pond or Tank they live in.

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What's the problem with what? Goldfish grow to around 8-12 inches and some koi can grow to around 3 feet. That is why goldfish need a nice sized tank and koi need to be in a pond of at least 1000 gallons and not those tiny death trap bowls and then wonder why they died. Or think they did a good job because they lived for 2 years, goldfish can live for 20+ and some koi have been known to leave 100s of years.

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First off fishes, unlike mammals, continue to grow all their lives. Second, a fish will grow only so large as the space it lives in allows. So, I would say that if you have particularly large fishes this would be normal, although I have no idea how large a tank or pond you are keeping them in. Goldfish and Koi are varieties of carp which will grow quite large. So what is the problem?

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If you mean that the fish have grown large, all I can say is that they are supposed to do that.

If you mean that they are swollen and bloated, then it could mean they have dropsy, which is normally caused by poor water conditions over a long period, and is normally fatal. Look to see whether their scales are sticking up, giving them a 'pine cone' kind of appearance. If they are, then it is almost certainly dropsy.

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my parents own a pond %26 I've overheard them talking about it quite often. I remember hearing that the bigger the pond/tank ect., the bigger the goldfish or koi will get.
hope this helps :]

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There is no problem, you are just doing a good job of caring for them! Make sure that you have not got them overcrowded, as a rough guide you need 1 litre of water for 1 cm of fish. Add their sizes together and if your tank/pond is below that capacity think about rehoming some, otherwise they will all suffer eventually.

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The size of your tank/pond will restrict the maximum a koi or goldfish could grow. That is probably the reason they are not growing in length.

As for their being fat, it quite normal for goldfish to be very fat. Koi are usually broader across their tummy but if they are over fed they will have a very big tummy, much like the carps target are targeted by fisherman.

Thats assuming the fishes are not suffering from dropsy as mention in the post above.

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If the scales are popping out then your fish probably has dropsy, which is usually fatal. If not, they could be constipated and need veggies (like blanched peas). Otherwise, if the fish looks normal and healthy it's probably fine. You may just need to move them to a pond if they're that big.