Linux / UNIX Desktop Fun: Interactive Aquarium

Fsh is an entertaining interactive desktop aquarium. It was created as an alternative to Gnome easter egg called “Free the fish” for other operating systems.


Original gnome desktop easter egg

  1. Type alt + f2
  2. Type free the fish
  3. Press [Enter] key.

To kill fish type alt + f2 and type command:

pkill gnome-panel

Say hello to Fsh

From the project home page:

Fsh was created because I wanted fish on my desktop. I have a coworker running Linux, and there’s a feature (freethefish) that lets you have a fish swimming around on your desktop. I’m running Windows, so obviously, if I wanted a fish, I was going to have to do it myself.

Since then, fsh has added a number of features. You can have basic fsh, ninja fsh, invisible ninja fsh, sharks, laser sharks and barracuda. Sharks will eat anything except other sharks, while barracuda will eat basic and ninja fsh. Ninja fsh take the fight to the predators, and actively hunt down sharks and barracuda. Laser sharks will shoot at anything they can eat once it lines up with their laser.

You can customize how many of each fsh you get, along with a number of other parameters (like whether predators eat or just kill, whether to show blood on kills, etc) using the fshConfig program.

How do I install Fsh?

Type the following wget command to grab fsh:
$ wget
Sample outputs:

--2012-09-09 10:54:31--
Resolving, 2001:e10:ffff:1f02::17
Connecting to||:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 122216 (119K) [application/java-archive]
Saving to: `fsh.jar'
100%[==========================================================>] 1,22,216     176K/s   in 0.7s    
2012-09-09 10:54:32 (176 KB/s) - `fsh.jar' saved [122216/122216]

How do I run Fsh?

You need java to run fsh. See how to install and configure java. Type the following command to run fsh:
$ java -jar fsh.jar
Sample outputs:

Fig.01: Fsh in action

Fig.01: Fsh in action

You can download Fsh by visiting this page. If you enjoyed this desktop fun app, you may also like to use the following apps on Linux:

  1. Terminal ASCII Aquarium
  2. Run Steam Locomotive On Your Desktop
  3. Let it Snow On Your Desktop
  4. Summon Swarms Of Penguins To Waddle About The Desktop
  5. Text Mode Box and Comment Drawing

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nixCrat Tux Pixel Penguin
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I'm Vivek Gite, and I write about Linux, macOS, Unix, IT, programming, infosec, and open source. Subscribe to my RSS feed or email newsletter for updates.

1 comment… add one
  • Dan Wolfe Apr 21, 2017 @ 18:28

    Do the free the fish in Unity…. then really think about the result. LOL

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