ID please

[spkdtch]

noticed these things today on the back of my tank, shaped like nautilus shells, white, very small, about the size of the tip of a pencil
they are stuck to the glass, when i poked them with a stick, they eventually fell off the glass since they are only on the back wall, i cant take a picture, there is about 10 of them that i counted, not moving, but i sure didnt put them there, some for of hitchhiker

 

[flower]

They are good guys...they eat algae, and come out at night as a rule, in the day they hide on the rocks or anywhere else they think they are unseen. Under Power heads, and behind intake valves. Trust me there are many more than 10

 

[spkdtch]

what are they called? are they a type of snail or what? i saw a piece of LR covered in them, still curious as to what they are even if they are good

 

[spanko]

Sounds like Spirorbid worms. Look like this?

 

[spkdtch]

bingo, thats them

 

[spanko]

Will come and go with available nutrients. If there is too many you can just scrape them off the glass. Good filter feeders. Enjoy them!

 

[joe____17]

I have a bunch of those in my tank.