could (like any invert from shock) but I wouldn't count on it. a few peices of what, coral? if so manually remove all the snails you see and dip whatever you got in lugols solution (per dip instructions), TLF Revive, Seachem reef dip, tropic marin pro coral cure or other effective coral dip. you can toss a few of the removed ones into your dip (typically 10-15 minutes worth) just to see how effective it is or isn't. I havent had anything but the corals themselves survive a lugols concentration of 40 drops per gallon for 15 minutes. I know nudi eggs may survive the dip so the same might apply for snails. you should do a good visual inspection and scrape off anything that doesn't look like it should be there.