help ID hithiker snail explosion please

[kpiotrowski]

tank is about 6 months old. Started with dry rock so they had to come in as eggs on cuc, macros, or fish. I dozen of the rounded ones and hundreds of the black and white. closest I can come on the black and white ones are poss mexican cerith. at any rate, good? bad? TIA!


Uploaded with ImageShack.us


Uploaded with ImageShack.us

 

[jrgilles]

not sure, but my fuge has a bunch of little ones that look like the round one pictured.

 

[returnofsid]

The round one looks like a Nerite. The long, slender one looks like a Cerith snail.

 

[kpiotrowski]

Thanks. as long as they're not gonna be a pest, especially the "cerith" which are by the hundreds, I guess I just have extra. Anyone need some snails...