Come back! King of the Sea! Your people need your leadership!

Collect homeless fish, swallow your opponent's team, become the largest school of fish in the world, and rule the underwater kingdom!

Synthesis upgrade, enhance strength, crush opponents

Survival mode, explore the abyss, challenge the sharks

Mini game, brainstorm, save the little fish

Call your family and friends to experience it together!

Terms of Use:
Membership offers a weekly subscription, you will have a 3-days FREE trail period, after this period you will be charged $2.99.
After buying this subscription, you will unlock following features: Remove pop-up ads and banner; 150% Fish coin earnings; get 200 diamonds by daily quest every day.

Subscription Notice:
*Payment will be charged to your Account at confirmation of purchase
*Subscription automatically renews unless auto_renew is turned off at least 24-hours before the end of the current period
*Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal
*Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user`s Account Settings after purchase
*Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable

Privacy policy visit:
Terms of use visit:
Terms of Subscription visit:

What’s New

Version 2.24.1

FIsh is one year old this year, thank you very much for your support, happy first anniversary!

The contents of this update are:

A mini game for guessing shells has been added, and more diamonds have been obtained by guessing;

A new crazy treasure chest is added to the Deep Sea Secret Treasure, so go and explore;

Call your family and friends to fish together!

Ratings and Reviews

4.6 out of 5
6.1K Ratings

6.1K Ratings

ankitpatel29 ,

What happened to fish speed stats

I can no longer look at the stats of each fish, what is their speed and attractive. Is it hidden now?

Also I feel like the players are not real humans and its just AI. I paused the game once for 10 mins and when I come back, the game started from there and I ended up winning. Also another proof is that a round is supposed to be 1:30 mins but as soon as I die in first 5 secs, it shows me who was the winner and the rankings, how? Shouldn’t they be still fighting? Another thing I noticed is that I reached lvl42 fish and now there is no better fish than it and none of my opponents higher than me comes with that fish to fight.

wolfie_girl09213 ,

Why is this game so Addicting

Hi this game is sooooooooooooooo fun! And when I play it gets more and more addicting. One thing is needed I do not like how it takes soooooooooooo long to get a new number. Oh a few more things! I do not like how it is VERY hard to beat survival mode and the game has so many fish but I would like even more fish because it will make it more fun! Oh last thing? I think…The game is very addicting and like I said I thought it was the last but it is not I would like the game to make it so no matter what level you are on you can still kill people! Thx for making this game I am CRAVING updates thx for making this game!

Marshamara ,

It’s good but why AI

This game is good and very creative. The shark, although annoying, is still a fun addition and the survival mode is also fun. The fact that you can merge fish to get new ones is something I haven’t seen in a .io game so props to you! My only problem is that I think you compete against AI. My reasons are:
1. I can leave the game, go to a different app, come back and have nothing happen. No disconnects, no lagging, nothing!
2. When you play as a shark and the round ends, you can watch an add for extra time. If this was an online game how would this be possible? You would have to force the surviving players to continue, but it probably doesn’t do this. Why? Because it’s probably AI.
3. Some of the players are stupid. Sometimes a player at a lower level than me will just run into me and get eaten instead of running away. It’s either AI or a 2 year old.
4. This is probably not the best reason, but when I first got the game it was super easy for me and I had a decent win streak. It did get harder, especially with the sharks, but still.
I would give this 5 stars if I was competing against real people, but from what I’ve seen it’s just some AI.

App Privacy

The developer, Mars Game (HongKong) Network Technology Co., Limited, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Purchases
  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics

Data Linked to You

The following data may be collected and linked to your identity:

  • Purchases
  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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