They kind of do both it seems like
Whelks do bury themselves sometimes, but safe nassarius don't climb on the rocks...
What cuc have you added? And where did you purchase it from?What are these Little Critters that are appearing more and more in my tank? Are they a pest or good ? If a pest what if best way to remove them
My local Fish Store and couple snails and crabs ect ect
The safe nassarius (technically also whelks) that we usually want in our tanks don't generally breed in the tank - at least not very quickly. If you're seeing a lot of these then you *might* have an undesirable species ...
But... But... Mine do occasionally...
Like up high on the rocks?
No. They'll go up about 6" or so and then back down. But that's usually after I just fed the tank.
