Insaniquarium
The goal of Insaniquarium is to keep your fish alive, collect money, and defeat aliens. You begin the game with two small fish. As the stage progresses, the fish become hungry. Feed the fish by clicking your mouse near them, but be careful: In the early stages, you can only drop one piece of food at a time. If it falls too far from the fish's mouth, it will sink to the bottom and you will have to wait for it to disappear before you drop another piece.
As the fish grow, they drop coins. Collect the coins to pay for food, more fish and magic eggs. You need to collect magic eggs to advance stages.
As you progress through the game, aliens pop into your aquarium and try to kill your fish. Click on the aliens to defeat them and save your fish.
Fish Tycoon Aquarium
Fish Tycoon is another game that puts you in control of the aquarium. In this game, you are a fish store owner who is trying to breed seven rare types of fish.
The game is tricky. To succeed, you will need to manage different types of fish, with different food and environment needs; make money by attracting customers; and figure out how to breed the seven magical fish. This game requires you to care for your fish. Feed them the proper food and provide them with medication if they get sick.
Feeding Frenzy
Feeding Frenzy takes a different spin on the fish feeding game: It puts you in control of the fish instead of aquarium.
In each level, you begin as a small fish. Grow your fish by feeding on smaller ones and avoiding larger fish. Use your mouse to move your fish and to gobble up the little fish. Survive as long as you can by eating as many fish as you can and scoring the most points.