I have a different opinion on these snails. I too saw the eBay auction and was interested and so asked around. I received much the same information you are receiving here with an addtional scare of someone telling me that they were predatory snails and would attack all of the other snails in my tank. Well I ended up getting in touch with a biologist who uses these snails for research and found out most of what you here is not true. Yes they do live and can be found off the east coast of the US so they can live in cold water, but they live in the shallow mud flats and so when summer rolls along they live in quite warm waters. They are also voracious eaters so in order to keep them alive they have to be fed. I went ahead and ordered 100 and got about 130. I put the bulk in my main tank, some in the sump/fuge, some in my quarantine tank and 15 in a curing tank that was in my garage. Well so far most are alive. I did not loose anymore than I see with any other type of snail. This includes the ones in the garage thank that was exposed to the summer Texas heat all summer in the garage. I put in 15 snails and 12 are still alive. I also left them in my quarantine tank through 2 - 3 month hypo salinity treatments and they are still alive and kicking. Now this is just my experience but I feel that they were a good purchase.
