Please help me identify tiny snails in tank.

[Anton Wray]

I noticed an explosion of tiny small snails similar to my nassarius snails in my tank. Various sizes 1-3 mm. I was told that they don't reproduce in reef tanks. Are these snails just baby nassarius or some other parasitic snail. Can someone help me identify them. Thanks

 

[dragon99]

Looks like a dwarf cerith
https://www.reefcleaners.org/aquarium-store/dwarf-cerith

 

[KJ]

Whelk.