I found an awesome ascii aquarium for Linux terminals called Asciiquarium.You can now discover the mysteries of the sea from the comfort of your own terminal using ASCIIQuarium. It is an aquarium animation in ASCII art created using perl.

Installing Term-Animation

First, you need to install Perl module called Term-Animation. Open a command-line terminal (select Applications > Accessories > Terminal), and then type:

$ sudo apt-get install libcurses-perl
$ cd /tmp
$ wget http://search.cpan.org/CPAN/authors/id/K/KB/KBAUCOM/Term-Animation-2.4.tar.gz
$ tar -zxvf Term-Animation-2.4.tar.gz
$ cd Term-Animation-2.4/
$ perl Makefile.PL && make && make test
$ sudo make install

Download and Install ASCIIQuarium

While still at bash prompt, type:

$ cd /tmp
$ wget http://www.robobunny.com/projects/asciiquarium/asciiquarium.tar.gz
$ tar -zxvf asciiquarium.tar.gz
$ cd asciiquarium_1.0/
$ sudo cp asciiquarium /usr/local/bin
$ sudo chmod 0755 /usr/local/bin/asciiquarium

How do I view my ASCII Aquarium?

Simply type the following command:

$ /usr/local/bin/asciiquarium

or

$ perl /usr/local/bin/asciiquarium