Help I’d this hitchhiker on my hermit crab

[Hugo Garcia]

Hi guys, how is it going? I need help IDing one guy that came with in of my new hermit crabs I think it some kind of coral.

These are the images:

Please let me know if you guys know what it is.

Thanks.

 

[KJ]

Feather duster.

 

[DSC reef]

Feather duster, you beat me. Lol

 

[Hugo Garcia]

Feather duster.

Is it good? Or a pest?

 

[keddre]

Sideways feather duster

 

[keddre]

Is it good? Or a pest?

It's fine, just a filter feeder

 

[KJ]

Feather duster, you beat me. Lol