Fish Tycoon is a fish breeding simulation that allows users to raise fish in virtual aquariums. The real-time videogame features over 750 fish types, according to the game developer. Users breed fish in the hopes of creating the “7 Magic Fish,” which yield more fish and create larger profits.

Money from selling fish can be used to buy supplies, medicine, chemicals, store advertising and technology research. Additionally, players can purchase fish tanks, decorations, plants, fish eggs and fish food.

The original PC version of Fish Tycoon ranked in the top 10 casual games of 2006 for more than 40 weeks. The new version will be available for the holiday season on the Nintendo DS.