AquaWorld has two locations - one in the city on Gravois (before you hit Grand coming from the county) and one out in west county on Manchester by Old State.
3910 Gravois Avenue
16063 Manchester Road
Tropical World pets is Sappington/Webster area on Watson.
8444 Watson Road
Darn, I wish they had stopped supporting puppy mills
Basically ANY pet store that is selling kittens and puppies is getting them from mills, horrible places that keep them in cages and basically breed them til they die
The animals coming from those places often have many physical and temperament issues as well.