In Fish Tycoon, players engage in virtual fish breeding, aiming to discover and breed the elusive 7 Magic Fish while managing their aquarium's ecosystem. Players must buy supplies, care for their fish, and sell them in a virtual pet store to fund their breeding efforts.

The storyline of Fish Tycoon revolves around solving a genetic puzzle by experimenting with different fish breeds to unlock the secrets of the Magic Fish. Players navigate through various challenges while nurturing their aquatic pets.

Fish Tycoon stands out with its real-time gameplay, offering new surprises each time the game is played, and features over 400 different species of fish to discover, enhancing the depth and replayability of the game.