Help
It comes out of a tube that protrudes form the rock by about 1-2cm the thin feeler type thing that you can see extends on this one to about 10cm before retracting back into the tube. I have at least three of them in the tank at present.
They seem harmless and just go about their business sifting in the current and moving over the surrounding rock work. Sorry the photos poor they are quite difficult to catch with the current. The picture also shows another smaller one up and to the right.
Many thanks.
Rocky
