hello and please help

does anyone kno wat these are?

 

Its not very clear but it looks like they are vermatid snail tubes or fanworm tubes

fan worms or tube worms = harmless filter feeders

vermatids will throw out a silk looking thread and it sweeps accross the rockwork collecting food and then they withdraw it and consume anything edible they catch
the biggest issues I had with Vermatids was A - they can irritate any corals that the thread drifts over and B - they propogate rapidly and you need to be extra carefull when moving rocks as this things are very sharp and stick in your fingers very easily ( I know this from painfull experiences when stripping down a tank)

Steve

 

i knew you'd be the one to go Happy Days 0n the greeting.

 

Hello and welcome to the 3reef fam.