WOW! Be careful what you get from the Wal-Mart pet shop. On Googgle I found at least five different genera (scientific names) of shrimp that had common names of Ghost Shrimp. The small fish food shrimp you want for pond stocking have the genus name Palaeomonetes as noted in the above posts.
Also, I found that adult brine shrimp do not appear to be called ghost shrimp.
