Tiny Snail in Tank

[codewon]

I saw this little white snail about a half a cm long. I took the picture hours after turning the light off but I turned it back on to take the picture. I saw one about a cm long the other night but couldn’t get a picture.

Does anybody know what these are?
Are they harmless?

Thank you!

 

[Trixter227]

Looks like a nassarius snail to me? Does it dig into the sand?
Someone will help out im sure!

 

[codewon]

Looks like a nassarius snail to me? Does it dig into the sand?
Someone will help out im sure!

Not sure, I have seen only twice for brief moments

 

[Trixter227]

Not sure, I have seen only twice for brief moments

Im almost sure its a nassarius. The shell patten along with the "trunk" is a dead giveaway. If so its a good cleaner. Mainly eating leftover food, and detritus. Not so much algea.