What are these?

[tammy.englehart]

These are in my sump growing from the rock. Good, bad or indifferent? I've have had my sump for about 1 year. Thanks for any help.

 

[ebushrow]

They are just feather dusters ... As long as they don't irritate any corals they are harmless.

 

[tammy.englehart]

They're in my sump so they're not around any corals. I was afraid they would block off the water flow. Thanks for your help.[emoji4]

 

[tat2z_21]

They are awesome filter feeders.

 

[tammy.englehart]

Do they come as hitchhikers on the LR?

 

[Coralsdaily]

Possibly, sometimes from coral colonies too. They are harmless and helps with your water clarity as they go through junk in the water.

 

[tammy.englehart]

Thank you for your help!