Anyone know what this is?

[Katiesorrells]

This little white thing has started growing in under my coral. Does anyone know what it is?

 

[Katiesorrells]

 

[ATB USA]

I see a feather duster and a aiptasia

 

[ScottR]

Feather duster worm and some tube worms.

 

[cngh]

Maybe I need my eyes checked, but I just see feather dusters, which are fine.

 

[vetteguy53081]

These are tube worms and no aptasia present. The tube worms use the fans to capture food. Although harmless their fans can steal food from coral and annoy coral if too close.

Tube/fan worms:

 

[Katiesorrells]

Should I keep them or go ahead and pull them out? Looks like there is the one big one and two really small ones growing behind.

 

[ScottR]

Should I keep them or go ahead and pull them out? Looks like there is the one big one and two really small ones growing behind.

They’re just filter feeders. No need to pull. Some people will pay to get a nice feather duster like that. The smaller ones are common and shouldn’t get much bigger.