Does anyone know what kind of snail this is?

[DJTJ]

These snails are everywhere in my tank in all kinds of sizes and appear to only be active at night. Are they coral pests or beneficial hitch hikers?

 

[Neon_Devil]

I have a bunch as well. They don't seem to be aggressive but I'd like a definite answer also.

 

[shakacuz]

you mention different sizes. are they still relatively small (perhaps 1/4 inch?) i am thinking collonista snail if they're all mostly under 1/4in.

 

[Goaway]

probably collonista snail.

A picture of my adult snails.

 

[vetteguy53081]

It is collanista and these multiply quickly in many cases
Slow to clean algae but good workers