I have a pair of peppermints and a coral banded shrimp. The CBS doesn't like the peps getting close to him, but they stay out of each other's way and all is well. And that's in a 16 gallon tank. I've heard of others with really aggressive shrimp, though. You never know for sure.
55 gallon reef tank. AquaticLife 4-bulb T5 HO with 4 LED moonlights. Reef Octopus BH-1000 HOB protein skimmer. TLF Phosban Reactor 150 running 400ml of NPX Bioplastics with a Maxi-Jet 1100 and a BRS Reactor running activated carbon with a Maxi-Jet 900. Vortech MP10w.