Fish Tycoon - DS Mooch

Fish Tycoon is a fish-breeding simulation that lets players raise fish in real-time virtual aquariums and cross-breed them to their liking to create new breeds to sell in their store.

Selling fish provides funding for supplies, medicine, special chemicals, technology research and store advertising to attract more customers. Players start with a small selection of fish that they must nurture and breed as they work to discover the correct genetic combination for the '7 Magic Fish'.