Is anyone know which snail is this they came out in the night and during the day they burry themselves in my sandbed my lfs call them babylon snail but with that name i cant find anything
I would remove them if that's what they are. Maybe take them out of the baggy and go for another couple of pictures to see if we can confirm the ID. Thump one so it goes inside and snap a couple of shots of both sides of the shell.
They look like nassarius snails. I had one I my tank and it looked like a zombie coming out of its grave every time a piece of food got put in the tank. One of my favorites as far as snails go.
That definitely looks like an olive snail to me too. I wouldn't keep them in my reef because they are known to eat clams and other bivalve mollusks. If you don't plan on keeping clams they may be ok. But myself, I wouldn't trust them.