# Jellyfish World — Relaxing Idle Game

> Relaxing idle game for raising and caring for virtual jellyfish. (iPhone/iPad app by Basement Apps, Inc..)

- Source: https://appshunter.io/ios/app/jellyfish-world/id1564205963 (this page in markdown: same URL + `.md`)
- Developer: [Basement Apps, Inc.](https://appshunter.io/developer/1092009455)
- Category: Games, Entertainment, Casual, Simulation
- Price: Free
- Rating: 3.67/5 from 3 App Store ratings · 36 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 83 MB
- Languages: English, Japanese
- Released: 2021-04-26
- Data updated: 2026-06-11
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/jellyfish-world/id1564205963/reviews.md

## What is Jellyfish World?

Relax with healing a whale and BGM!
Your mission is to name and raise Jellyfish.

There are only two rules
・ Feed once every 3 days
・ Clean the water diligently when in contact with Jellyfish.

It is a loose fluffy game that you can proceed at your own pace even if you are busy.

The longer you spend in contact with the Jellyfish, the faster the Jellyfish will grow.
Also, please note that the Jellyfish will die if left unattended.
Grow your favorite Jellyfish!

## Key features

- Name and raise jellyfish
- Feed jellyfish every 3 days
- Clean water diligently
- Jellyfish grow with contact
- Idle gameplay
- Relaxing BGM

## Recent user reviews (10 of 36)

All indexed reviews: https://appshunter.io/ios/app/jellyfish-world/id1564205963/reviews.md

### 1/5 — Ugh

*2025-03-10*

So a lot of times I find good games but this might be one of the baddest games I have played sorry

### 1/5 — 大きさ2倍の広告が表示されない

*2022-12-04, version 1.1*

今、ゲームをしてる最中ですがログイン時に2倍の広告が見れない状態です。毎回見れないので見れる状態にして下さい。

### 1/5 — ポイ活〜

*2022-07-19, version 1.1*

餌食べるの遅いので待ってたら死んでました！やっと成長したのに無駄になりました！拘束時間長いのでお勧めしません！

### 2/5 — 回復度あげて欲しい

*2021-09-19, version 1.1*

クラゲなので進むのが遅いのは分かりますが、クジラの方が進むのが早いので楽。それだったら餌1つの回復度を上げて欲しいです。

### 2/5 — なかなか大きくならない

*2021-08-02, version 1.1*

育て始めて二週間以上になりますが中々大きくなりません。毎日隙を見て二倍になる広告再生とタップを繰り返していますが、なかなか…。あとクラゲさん、餌食べるの遅すぎます！あとはアプリ内で何かをする度に広告の動画再生は必須なので、忍耐力が必要ですね。

### 1/5 — 直してよ。

*2021-07-22, version 1.1*

小さい時は可愛いとは思うけど、でかくなるにつれてちょっときもちわるい。

餌食べる時動くの遅すぎてめちゃくちゃ時間かかる。クラゲ自体のスピードはそのままで構わないけど、餌が落ちてきた順に食べるから何回も往復するところが可愛いんだろうけど普通に近いところから食べてほしい。

### 5/5 — かわいい

*2021-07-20, version 1.1*

可愛くて癒されます！
暇なときに眺められていいですよ〜

### 3/5 — 2倍の広告が再生できない

*2021-07-14, version 1.1*

クラゲの成長を2倍にして受け取るための広告動画が再生できません。

### 5/5 — ほほほほーん

*2021-06-19, version 1.1*

暇つぶしになります

### 5/5 — 癒される

*2021-05-16, version 1.0*

初めはクラゲさんに癒されてましたが少ししたら早くおっきくさせようとしてあまり癒されてません()どうでもいいけどこのアプリ紹介の時のあの画像。名前がクジラで吹いた

## Frequently asked questions about Jellyfish World

### What is Jellyfish World?

Jellyfish World is a relaxing idle game where your mission is to name and raise virtual jellyfish. You'll need to feed them and keep their environment clean to help them grow and thrive.

### How do I care for the jellyfish?

There are two main rules for caring for your jellyfish: feed them once every 3 days and diligently clean the water when in contact with them. The more you interact, the faster they grow, but they can die if left unattended.

### Is Jellyfish World free to play?

Yes, Jellyfish World is free to play. The app is supported by advertisements.

### Can I play Jellyfish World if I'm busy?

Yes, it's designed as a loose, fluffy game that you can proceed at your own pace. Even if you're busy, you can still enjoy raising your jellyfish without feeling pressured.

### What makes this game relaxing?

The game features relaxing background music (BGM) and the gentle act of caring for virtual jellyfish. The idle gameplay allows you to engage with the app without demanding constant attention, contributing to a peaceful experience.

## Version history (last 2 releases)

### 1.1 — 2021-05-20

Bug fixed

### 1.0 — 2021-04-26

No release notes.

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## More apps by Basement Apps, Inc.

- [おもしろい人気無料ゲーム　CORE](https://appshunter.io/ios/app/core/id1141817901)
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- [MILLION COIN X（みりおん こいんX）](https://appshunter.io/ios/app/million-coin-x-x/id1236091133)
- [かんたん履歴書 証明写真カメラ](https://appshunter.io/ios/app/id1405525729)
- [Pocket Aquarium “Pokerium"](https://appshunter.io/ios/app/pocket-aquarium-pokerium/id1434823891)
- [Block Crusher ™](https://appshunter.io/ios/app/block-crusher/id1477168792)

All apps by Basement Apps, Inc.: https://appshunter.io/developer/1092009455

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*