As I mention on the previous part. These colorful fishes are very friendly, they surely come around whenever people around,
and they are ALWAYS hungry! No matter how many times you feed them, they’ll grab it all.
That’s why you have to be careful not to overfeed them. Because a tournament level fish, must have a torpedo like body (they cannot be too fat!).
The fish will have good colors and appearance if thes pond is well maintain, enough oxygen supply, a well operated water filter and of course good nutrition. So never throw any of your food into a koi pond, if the owner see you, you might get into trouble 
A good Koi fish worth a fortune, especially the one that has won a tournament, its value will be doubled or even multiplied even more.
So how to identify a good qualifying Koi fish? A good koi fish have a good pattern (Kiwa), its pattern must be solid in color and well balance.
But, just like an art, fish collectors may have their favorite one, even though it’s not a tournament level fish.
Just like my late dad favourite one:
Look at the circled one below, the heart shaped Tancho kohaku. A very rare pattern on a fish.
by moxeous
Wow! the heart-shaped koi pattern is beautiful. Must be cost a fortune. Have you sent this one for competition?
What fabulous fish.
I have never heard of these types of fish.
Their beauty and their uniqueness is amazing!
I’ve been told that a white koi that has won a tournament, could worth USD 300,000. However, the owner doesn’t want to sell it.
wouldn’t these pics. be great as a jigsaw puzzle!!!!
I learned that Koi fish can understand what the owner say after certain times, like a dog.
They will gather beside the pool once the owner get near.
fascinating..very interesting..
i really love kois. they are very friendly creatures. very colorful too! and yes, they cost a fortune! i wish to have my own koi pond someday.. the really make good pets!
@vanilla7: No, it’s not the kind that will win the tournament, but it is very unique and rare pattern indeed.
@violet: Sometime, for the owner, those fish are like babies, so no wonder their owner won’t sell it even for a thousand dollars.
@rainfield: That is very true!
@kikamz: Not all Koi fish are expensive, you can start by buying the young one (tategoi) they less expensive than the adult ones. But most importantly, you have to build the suitable pond and filters first, before buying the fish.
@others: Thank you!