are these bad snails

[hammcd]

i found these snails in a tank im about to shut down...just curious as to what they are

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Edit: im talking about the 2 smaller ones of coarse

Edit: im wondering if they are sundial snails

 

[lilrobb]

Can't think of the name, but harmless...

 

[hammcd]

they arent the sundial that eat zoas?...they kinda look like them but wasnt sure :

 

[lilrobb]

You made me google it...

Those are Collonista snails...

 

[irahmatulla]

Yeah, they definitely do not look like the pictures in the link of the sundial snails. I have always seen these little hitch hikers, but never really seen them get bigger than the size of a small pearl.

 

[hammcd]

LilRobb;691159 wrote: You made me google it...

Those are Collonista snails...

man, i googled that thing for half an hour..thanks

 

[irahmatulla]

Hey guys, I browsed this thread the other day, and just for the last two days some of my Radioactive Dragons Eyes have not been opening, adjusting for some new additions [coming saturday (Thanks Kirru!)] I came across what is undoubtedly a Sundial Snail. Remembering from the pic I picked him out. I normally think "aw cool more critters" but now I am dreading that these things are like roaches and if you see one there are bound to be 1000. It was the size of a pencil eraser around and as thick as a dime. Should I be worried, or are they slow growing semi-rare hitch hikers? Have not made many new additions in the last months.....so I am worried? Experience tips please?