What kind of shrimp?? I have only seen cleaner shrimp go after something that is already dying...
Fire or flame scallops have a relatively short lifespan. I think about a year to a year and a half. Don't look at it as a long time inhabitant of your tank.
Jim
_________
90 Gallon glass, 135#'s of rock and 2" sand. 2-250w 20k XM metal halides. 2-95 watt actinic VHO, 4 powerheads, Coralife skimmer. Maroon Gold Striped Clown, Blue Chromis, Kole Tang, Pygmy Angel, Serpent Star, Brittle Star,Gorgonians, Mushrooms, Yellow Polyps, Turbo Snails & Blue Legged Hermits. 20 gal sump with Caulerpa, Mag 7 return pump. | 
peppermint vs scallop 
