Peppermint Shrimp Dining
I've never actually seen a Peppermint Shrimp eating an Aiptasia within my aquarium even though they are part of my clean up crew. Having said this, I have often read on forums that to stand the best change of seeing some action - you need to introduce more than one shrimp. The preferred ambush tactic of these little critters is group warefare.
Take a look at this You Tube video, and you can see exactly what these little fellows are capable of.