Definitely take Beverly's advice on the websites... TONS of information there, including pros and cons to wild caught vs captive bred. Take my advice, which ever you go with, make sure they eat frozen mysid, or you will be in for some large "grocery bills" for your horses, (I was spending $100 a week on ghost shrimp alone for 6 H. Riedi
... They are now all eating frozen mysid... only took a year
).
Robert