Good evening!

[Krzydmnd]

So I have hundreds of these little white Snails that only come out at night for a few months now but tonight I saw these black Snails that I've never noticed before. Any idea what they are?

Also only coming out at night.

 

[Maggie321]

White ones are colonista. Blackish ones look like nassarus. Do you have any in your tank already?

 

[reef lover]

Think SAPPER nailed it on the other thread...dove snail