Sticky fish or green amoebas are a real double-edged sword in Zen Koi game.

Most of the time they’ll attach themselves to you and slow you down. If a bunch of them attach to you, you’ll get slower and slower.

There are three ways to avoid them.

  1. If your speed is reasonably high, you should be able to outun the green sticky amoebas.
  2. If they’re stuck to you, try standing still for a little bit. They will be attracted to motion elsewhere, and un-stick from you.
  3. You can swim through green plants to knock them off your back.

The great thing about the sticky fish is that they often attach to other fish, slowing them down. This is great if it’s a fast fish like the slim fish, and you can quite easily catch up and gobble both at the same time.

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Leaf Fish

These fish are camouflaged with the green leafy plants, and you’ll notice that if you start chasing one, it will try to escape to the nearest plant to find safety in the leaves. While other fish also like to hide in the leaves, the Leaf Fish is impossible to catch if it’s hidden, whereas the others are just camouflaged.

The best strategy for catching these is by making sure your Koi has good speed stats, and chasing the leaf fish when they’re far from the safety of a leafy plant.

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Stone Fish

Stone Fish? Rock Fish, Armor Fish? I’m not really sure what these are called, but they’re durable!

These tough fish don’t move fast but they have a series of tough plates on their back like armor. It seems that when you first go to eat one of these, nothing happens… but if you look carefully, you’ll notice that each nibble your koi takes on the Stone Fish, it loses one of the plates on it’s back. When all plates have been nibbled off, you can then eat the Stone Fish.

It may take 4 or 5 bites to finally eat the fish, so these take a while to eat.

Chomp. Chomp. Chomp. Nom!

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Puffer Fish

Puffer fish are probably the hardest to catch in Zen Koi. Even though they swim really slowly, and don’t turn quickly, they’re really tricky to catch.
Whenever you try to swim to them, they inflate, and cannot be caught.

How to catch Puffer Fish:
The trick is to swim behind them, and sneak up where they can’t see you coming. If you approach at any angle that’s not exactly behind them, they will spot you and inflate.

If you do happen to get the angle wrong, just pause for a moment and the puffer fish will swim forward a little and deflate. Most of the time, you’ll then be in a good position to sneak up on it.

Edit: Some readers have suggested holding your finger down and lead your Koi to eat the puffer, rather than tapping on the puffer fish directly. This seems to make the puffer less likely to “puff”, but you’ll still need to approach stealthily from the rear.

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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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Green Fish

Greenies are among the first fish you encounter in Zen Koi. They’re pretty slow, and easy to catch.

For the first few levels you may not be able to catch the much faster slim fish, so you will have to level-up mostly with the green fish at the beginning.

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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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