I have two cleaner shrimp, a coral banded shrimp, and I'm not sure how many pep' shrimp I have. My two cleaner shrimp are ALWAYS sitting near the front of the tank just waiting for food to pass by. If I stick my hand in the tank they will usually come up and get on my hand and start cleaning. I guess I have a lot of crud on my hand that I can't see. My coral banded shrimp hangs upside down in the same crevice underneath a rock and I rarely am able to see him. As far as the pep' shrimps I never see them unless the lights are off and I hit the tank with a red light. As far as I know I have never had a pep' shrimp touch any of my corals, and I have alot of acans, chalices, various other LPS, and a ton of SPS. Just a word of advice though. If you are getting the pep' shrimp to help control aiptasia you might consider going to the coast and netting them yourself. I have purchased several from the LFS and only one of them has ever touched aiptasia, but every one I have ever received from the coast eat aiptasia. Plus you can catch some other cool critters too while you're down there.