HOW TO PLAY
Controls and goals
- How to operate
- Fishing, aquarium, and scoring are operated using the screen buttons. After releasing the placement function, left click to install, right click to delete.
- Goal
- Collect fish and update the aquarium score by rarity and size
ABOUT THE GAME
Wait and fish,
Increase the number of faces in the aquarium.
"Slimarium" is a game where you fish in a lake and collect them in an aquarium. You can catch as many fish as there are fish shadows reflected in the lake, and the longer you wait, the easier it will be to catch good fish.
AQUARIUM
The fish you caught,
Look around the aquarium.
On the posting screen, the fish you caught are swimming in blue water, the current number of fish is displayed on the top right, and the scoring button is displayed on the bottom right. In the aquarium, you can see up to 100 fish you have caught so far.

Actual play shooting: Detour Playlist Editorial Department/Poster column: Shu, Oborodoji, Kazura's MUSIC/Kazura, Inukai/Sakana no March/Distribution: unityroom
The longer you wait, the easier it will be to catch good fish.
Click the "Fish" button on the bottom right to catch as many fish as there are fish shadows reflected in the lake. The longer you wait, the easier it is to catch good fish, and the effect increases up to 30 seconds.
Scoring by rarity and size
The rarity of each fish and the size caught will be reflected in the aquarium score. Some fish have gold crowns.
You can decorate your aquarium starting with 50 fish.
If you catch 50 or more fish, you can place objects in the aquarium. You can switch between distant view and close view, fixed view and fluffy view, and the placement does not affect the score.
PLAY NOTES
Play notes
- Required time
- The estimated time for the official work page is approximately 30 minutes.
- Language
- The official work page and the confirmed in-game UI are in Japanese. Support for languages other than Japanese could not be confirmed in official materials.
- Fees/Support environment
- You can play for free on unityroom and is compatible with PC and mobile browsers. The wheel operation used to rotate and scale the placed items is only available on the PC.
- Save/Account
- You don't need a unityroom account to start the game. In the poster's official reply, a secret window is introduced as a way to play from the beginning without save data.
Wait on the water surface,
Let's welcome the fish to the aquarium.
On August 5, 2026, we confirmed the unityroom official work page, list of mobile compatible works, and live commentary policy. The two published images were taken by the editorial department on the official web version. Sources: Slimarium - unityroom official work page, unityroom List of works compatible with mobile browsers, unityroom game commentary policy
STREAMING INFO
Streaming and video uploads
Slimarium's official work page says "Live broadcast OK". The unityroom live commentary policy allows live video, live streaming, and monetization, and requires that the game title, poster name, and work URL be clearly displayed. Please also review policy prohibitions.




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