Its wehre you feed fish to collect money and don't click me upgrades for your food type and how much you can drop.
Also you can upgrade your laser to fend off aliens that attack your fish.
As you progress farther in the game you can get better/cooler types of fish such as carnivores and ultravores.
And if you get bored of the regular game then why not try the Virtual Tank?
The virtual tank is basicly a fish tank where you can feed your fish like a real fish tank!

While in virual tank you can set it as your screen saver so you can get more shells while your at school/work.
Since you have to pay money to get the full version I put in a crack so you dont have to pay.

Just run the setup then put the file from the crack folder in the .zip and put it in the insaniqurium folder.
Link