Can snails loose their shells?

[phatfish]

Found this guy running along side my glass. Is it a snail without its shell? Also, will hermit crabs steal shells from snails?
Thanks

 

[jay0705]

No idea what that is lol but yes hermits will kill snails for there shells. Get a few empty shells and leave them in ur tank and that will help

 

[bang guy]

Yes, it actually is possible for a snail to lose it's shell for various reasons. Given a LOT of time they can even regrow it but typically they are quickly eaten without their protection.
That said, the animal in your picture appears to be the Sea Slug Oxynoe antillarum. They are normally only found on Caulerpa.
When Hermit Crabs steal shells from Snails they almost always eat the Snail.

 

[phatfish]

Thanks for the feed back. Looking online, it seems like it is a sea slug. Are they good? or is it something I am going to have to monitor?

 

[bang guy]

If it is the Slug I think it is then it can only eat Caulerpa.