Montipora issue

[mahenke]

Can anyone identify if this is at all a pest or disease or concern ... all my montipora has these hard calcified stringy lines on the bottoms... rest too is fine?

 

[Uriken]

Do you notice feather dusters from the tubes?

 

[Lividfanatica]

Can anyone identify if this is at all a pest or disease or concern ... all my montipora has these hard calcified stringy lines on the bottoms... rest too is fine?

They are fine. Just tube worms. They won't grow on live tissue.