I'm sure you have some local reefers in your area that would gladly trade you something(frags or livestock) for snails. try checking if you have a local reef club, you probably do. Not only can you get rid of the snails but might find some local reefers to talk, hang out , trade with, etc.
I've always been lucky with shrimp and have never had one last less than a year(fire, peppermint and cleaners). I always drip acclimate them for at least 4 hours and longer(up to 8 hours) if there is a big salinity swing from the lfs water.
p.s.- dont know if you were joking but dont throw anything back in the ocean after having it in your tank. you can introduce some bad things potentially.