What is this please

[Rob M]

It is on my glass next. Is it good or bad? Or just fish poop

 

[Rob M]

 

[Shep]

Its hard to tell, can you do a new photo that is more focused on the mystery object, its too blurry.

 

[Rob M]

This best I can do for now maybe I will get better camera.

 

[Aquarian]

It is a tube worm that builds it's tube out of the substrate, harmless detritus feeder. If it bothers you where it is just knock it off the glass and stir up the sand in that area.

Polychaete - Chaetoplerid
Tube worm

 

[Rob M]

Thank you. Very helpful. Doing water change now so I will just know it down