CBS are a "no no" in my opinion for just about any tank with small fish. I doubt it will go after the Coral Beauty but the Mandarin could be fair game depending on its size.
If your looking for some shrimp for the tank you can always put in Skunk Cleaners or Peppermint Shrimp. There are very easy going and you won't have to worry about loosing any fish to them. Just be aware that the CBS may cause problems with these shrimp in the same tank as well.
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Rodman
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