Fish Tycoon review at IGN.

"Oh Nintendogs, what have you done to gaming? It seems like every other title released on the DS lately involves passively observing some animal or creature, skimping on gameplay with the assumption that the animal's personality will make the experience worthwhile. Majesco's Fish Tycoon is a game that succeeds as a virtual aquarium but fails at pretty much everything else."

Full Source: IGN