Eggs and the Egg List

So as mentioned in the page on breeding, after you breed with a mate, the resulting egg goes into your Egg List.

Here you have 8 available slots to hold your eggs until they’re ready (or you are) to hatch them into your pond. Eggs seem to take a different amount of time to be ready to hatch based on the patterns of their parents.

It’s important to keep the numbers of eggs in your list below maximum, because if you have the Egg List full, you will not be able to breed.

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Make sure you leave room in your Egg List!

If you have space available in your “My Koi” you can go ahead and hatch some of the ready eggs into your pond. When they hatch, you will discover what color and pattern they are, and that combination is immediately registered in your collection. After that, you can decide whether you want to trade, release or ascend them.

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Colors in Zen Koi are made up of combinations of Koi Base colour and pattern colour. the names of these seem to be inspired by Japanese colors, but combined to make new colour names.

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So for instance this Koi above has the base color of black (Kuro “くろ” in Japanese), and the pattern color of white (Shiro “しろ” in Japanese). These colour names are squished together to form “Kushiro”.

The Sutato part of the name refers to the pattern, which we’ll discuss on the patterns post.

You may wonder, what if this Koi had white base color with black pattern. In this case the color names are reversed “Shikuro”

There are 16 common color combinations:

White = Shiro (しろ)

White/White = Shishiro
White/Yellow = Shiniro
White/Red = Shidai
White/Black = Shikuro

Yellow = Kiiro (きいろ)

Yellow/White = Kishiro
Yellow/Yellow = Kiniro
Yellow/Red = Kidai
Yellow/Black = Kikuro

Red = Aka (あか)

Red/White = Akashiro
Red/Yellow = Akaniro
Red/Red = Akadai
Red/Black = Akakuro

Black = Kuro (くろ)

Black/White = Kushiro
Black/Yellow = Kuniro
Black/Red = Kudai
Black/Black = Kukuro

When you breed with another fish, the resulting offspring may have any combination of the parents’ base and pattern colors.
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So for this image above, you can see the potential offspring colors that are a combination of the base and pattern colors from the two parents.

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Breeding Basics

After gaining a few levels, you’ll encounter the message “Your Koi is now an adult and can breed.” This is the beginning of a major part of Zen Koi game, the breeding and collecting different kinds of Koi. Breeding can also be the most exciting part of an otherwise relaxing game.

Every now and then as you play, another adult Koi will swim near to you, a large circle will surround you two, and if you follow them closely, you will be able to breed with that Koi, and the resulting offspring will have characteristics of the two parents.

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In order to breed with another Koi, you will need to follow them closely until the circle timer is full. The other Koi may change direction, so you’ll have to closely follow to try to catch up.

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If you manage to complete the breeding, an egg will result, and you will be able to save it in your “egg slots” to hatch at a later date.

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Sometimes when you hatch an egg, the offspring will follow you around the pond for a while. It’s very cute.


Breeding tips and tricks:

  1. When the other Koi first come towards you, don’t swim towards them. Instead, pause until they reach you. Then they will swim off, and you can quickly follow.
  2. The breeding completion circle goes faster the closer you are to the other Koi, so swim close!
  3. If you lose sight of the other Koi, you may lose your chance to breed with them.
  4. Instead of tapping to follow, try press and hold to move during breeding – with your finger following the nose of the other Koi. This will get you closer and closer.
  5. You will always be able to move faster than the other Koi, but they may be more agile.

Got any breeding tips, please share them in the comments!

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Jellyfish are one of the first fish you’ll encounter in the game, they’re pretty slow, although they move in a pulsing pattern, so there will be times your Koi will miss them or overshoot. Not to worry, you should be able to catch up without too much problem.

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Angel Fish

Angel fish or Flying fish swim in bursts – so will slowly swim forward as they extend their wings, then burst forward in a rush. This can make them very frustrating to catch if your speed isn’t fast enough.

However usually by the time you get to catching Angel Fish, your Koi’s speed will be pretty fast, so you shouldn’t have as much difficulty catching them as Stone Fish or Puffer Fish.

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Skinny Fast Fish

The slim fast fish are hard to catch, especially at the beginning, when they are much faster than you.

There are three approaches that seem to work to catch them.

  1. Level up our speed with the smaller green fish first. These are much easier to catch than the skinny ones, and after a few levels, you’ll be in better shape to try and catch the skinny ones.
  2. Follow them to the edge of the pond. They won’t leave the pond, and will be forced to turn left or right. When they do, you can try to head them off and catch them. This will work much better than just tapping on a fast fish and hoping you can catch up.
  3. If you see a fast fish with a sticky amoeba on it, it will be going much slower, and you can catch it with ease.


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Levelling Up


Every time you eat a prey, you gain a little experience. With enough experience, you’ll gain a level, and when you do, you can use that experience to improve an attribute of your koi

Experience is shown in the circle around your level number. When it’s full, you will reach a new level and have Ability Points to allocate to one of your attributes.


So the example below, I have 3 ability points that I can put into Agility, Speed or Rarity.


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Here’s my understanding of what the attributes do, and please add to the comments if you have any thoughts on this.

  1. Agility
    This stat modifies how quickly you can turn, and if improved will help you catch prey much faster. This is what I recommend you put the majority of ability points in at the beginning. Agility also improves the “lunge” when you try to catch a prey.
  2. Speed
    Simply – how fast you can swim. At the beginning, most prey will be faster than you, so you’ll need to get this up to a reasonable level to make your life easier.
  3. Rarity
    This seems to improve the chance that your rare color will be passed on to your offspring. So if you’ve got a koi with a common color, you can prioritize the other two stats over this. However, if you find a rare color, you can spend all of your points on this stat to make sure you get lots of rare-colored offspring.

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Moving around

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The tutorial in the game suggests tapping on prey to catch, and that’s pretty much the best strategy to move around, but there are two other methods of moving.

  1. Tapping anywhere on the pond will make your Koi swim towards it. Sometimes it can be beneficial to swim near to a prey fish instead of tapping on it. Only when you’re approaching striking distance then switch to tapping directly on the prey. Why is this a good strategy? Some prey are very hard to catch like the Puffer fish, and need you to be perfectly aligned with them to catch properly. Other fish like the skinny fast fish are hard to catch, so you need to try and head them off by making quick course corrections. If you’re not fast enough to catch these by following, then this method is the only way to catch them successfully.
  2. Tap and hold. This makes the koi follow your finger. This seems to be the best method when you’re trying to keep up with a potential mate.

While nothing in the game can kill you, the red plants can slow you down, and you’ll see your koi close his eyes, as the red border appears on screen. So it’s best to avoid the red spiky plants, since they’ll interrupt your catching of prey and potential mates.




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