Are saltwater snails hermaphroditic?

[lessans]

If some snails are hermaphroditic, are there any snails that need a mate?

[psy_chick]

turbo, margarita, cerith, nassarius and Super Nassarius, banded trochus, bumble bee, nerite, and red foot moon snails are all male and female snails, good luck trying to tell them apart!

[nemonick84]

It's my understanding that even hermaphroditic species require mates. For example, the earthworm is a hermaphrodite - having one half male and one half female. In order for it to reproduce it requires a mate, positioning itself parallel - but opposite ended, from the partner. I think the snails you're thinking of are A-sexual meaning each individual is equipped with the right tools to carry out the job independently. As psy_chick states above, there are many different kinds that do require mates and are not A-sexual.

[Boatwizard]

Two snail meet and you have new snails on the way.
My nassarius went from 20 to over 100 in about 4 months.