Global No.1 relaxing game played by 50 million people all oever the world, the newest Abyssrium series!

Pretty corals, fish, penguins, jelly fish and adorable sea otters!
And a hamster who want to be sea urchin, cat and dog who dress up like sea creatures are waiting for you!
You can't imagine Abyssrium without the whale!

HELLO WHALE : IDLE AQUARIUM where adorable sea creatuers are swimming will help you relax and chill out. Take a break in the peaceful and wonderful HELLO WHALE : IDLE AQUARIUM!

[More convenient system]
You don't need to tap the screen!
Play only 5 minutes and nice seal will help you to harvest the materiials.

[A beautiful ocean world in the palm of your hands!]
You can pile and place various shapes of rocks or items and easily decroate your own ocean world.

[All sorts of underwater friends are waiting for you]

You can meet mommy and baby sea otter, three little squids, and crabs!
All sorts of underwater creatures including a giant tree-shaped coral, a fish encased in ice, giant clams, and landmark that lights the sea will be waiting for you.
The quiet, soothing background music will help you relax and chill out.

◆How to play◆

[Create the object with memories and fish will come to visit]
Make the recipe and invite fish by collecting ingredients from various way including coral factory, seaweed factory, and travel.

[Fish thrive on interactions]
Show your affection and fish will grow up.
Raise your fish and let them go trip.
They will come back with lavish gifts!

[Decorate your ocean filled with various items]
Settle fish in the Expedition Area and get Blue Scale.
You can buy decorations by getting Blue Scales.

[Play with friends]
Visit your friends' village and purify the their village's pollutants.
You can build up your village with friends by purifying each other's!

[Expand your underwater world]
Let your fish go trip beyond the ocean and they will bring new friends!
Collect various type of fish, expand and grow your underwater world!

Create a unique seabed filled with pretty coral and different kinds of sea creatures right now!

Follow and Contact us
Please contact for any suggestions or errors.
We will do our best to respond to your valuable opinion.

Official Social Media Account
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ㄴNaver Cafe (KR):
ㄴFacebook (EN):
ㄴTwitter (JP):
ㄴWeibo (CN):

What’s New

Version 1.39

- Brand Identity Change

Ratings and Reviews

4.7 out of 5
805 Ratings

805 Ratings

tinychristy64 ,


I never write reviews but I’ve been so addicted to this game I felt like I had to. Like most people have said it’s beautiful, and I like that nothing bad happens to the fish if you forget about it for awhile, and it also incentivizes you to keep growing the world through goals and following the story unlike other chill games. Like someone else mentioned the zoom can be a little annoying to maneuver but not enough that I’d dock a star.

sarah!!!! :) ,

beautiful game but a little frustrating!

i love the game - the music and graphics are lovely. i go on almost every day. however, i find one specific aspect very frustrating. you have to clear garbage away from the ocean floor, a process which takes five minutes. i’m fine with waiting for the garbage to be removed. however, the frustrating part is that you can only remove one piece of garbage at a time. so to remove ten pieces of garbage would take me nearly an hour, during which MORE garbage would appear. it really takes away from the peaceful aspect of the game and makes it stressful and frustrating. i would really urge the developers to make it so that you can remove more than one garbage at a time, or shorten wait time to 10 seconds, or something along those lines.

Tallyterror ,


This game is beautiful. I really loved playing it and enjoyed watching my world evolve. However, I am so frustrated. I have had some of my fish just disappear from my world. I thought they may have been moved to my storage for some reason. When I look for them, it says I don’t own that fish yet. This has happened multiple times with some of my favorite fish. After losing three of my event fish during this past event, I’m done. I’ve went to the Facebook page to ask for help twice and nothing. The in game support button sends you to FB or Instagram and I still can't figure out how to send a bug report. As much as I love this game it’s definitely not worth the frustration and disappointment.

App Privacy

The developer, FLERO GAMES Co.,Ltd., 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:

  • Identifiers

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Purchases
  • User Content
  • Identifiers
  • Usage Data

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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