Well live baby brine shrimp are good for newborn fish and adult brine shrimp are good for a ton of fish. Really I've only known one store and it was aquarium-only that sold actual live brine shrimp. What most people do is get a kit and hatch them theirselves real simple and not expensive petsmarts should carry these but if you can't find one in town here is a link to where you can order them from or just take a look to see what I'm talking about then look for it in town.
http://www.drsfostersmith.com/Produc...1&N=2004&Nty=1