With Petco at least, it depends on the district you are in. Our district (eastern MA) ordered all of their fish off of the petco portal and was sent a huge shipment. We also used a local retailer called "Fish Mart" for some of the fish and all of the small animals. So it just depends on the district that your petco is located in and how cheap/easily the fish are to come by. If there is a local bulk breeder in the area that will sell wholesale to petco, you can bet your britches petco is buying from them. Saves on shipping and such I'm sure. But if there isn't anyone around then they are forced to order from afar and will have them shipped. So it really just depends.
Shruikan - Black Orchid CT male Spyro - Copper Salamander HMPK male
Glaedr - Yellow Dragon PK male Thorn - Red Dragon PK male
Tornac - Blue Butterfly DeT male Eridor - Blue Dragon Marble DT male
Sparx - Female Salamander HMPK female!!!!!!
Sorority - Nugget, Cynder, Pina, Nymph, and Minerva
Felines: Brutus Beefcake, Yngwie Malmsteen, Rosalie, and Mia