clearerphish
Aquarium Advice Activist
OK, first, sorry for not having any pictures. I have a few tubes amongst my rock, very small, like perhaps the diameter of an ink cartridge inside a pen. They are white, and calcerous, and look very much like the tube of a feather-duster (but harder). Sometimes a very thin white tentacle/worm comes out and it comes out a long way-sometimes it even seems longer than the tube it resides in. Almost looks like a feeder tentacle or something. Sound familiar? I have 4-5 of these in my tank, a few have 2 tentacles.
