I can't speak to your particular shrimp but I'll bet, by salt, they really mean a brine solution. Saltwater is used in a lot of frozen meets because it helps maintain the tissue structure. That said, I wouldn't feed it to my anemone. Either go buy some fresh fish and cut/freeze yourself. Or, easier yet, spend a few bucks and get some silversides at a LFS. Why risk it? NOW...that all said, I stopped feeding my RBTA all together. Your lighting may be different, but I found I simply don't need it. If they get enough light a RBTA doesn't need direct feeding, especially if it has a clown (or 5 in my case) dropping scraps. So, perhaps you should just get a clown instead?