Found this on a frag - what is it?

[RaymondL]

Being a bit new to all this, I have my guess what this might be, but not really sure, so I wanted to check in with you folks what you think this is.

Thank you!

 

[Reeflix]

looks like a feather duster to me

 

[JZ199]

Looks like a very tiny feather duster

 

[RaymondL]

Looks like a very tiny feather duster

Ok thanks - I thought the same - thankfully, it's not a pest - I'm assuming these things grow in size?

 

[Cthulukelele]

Ok thanks - I thought the same - thankfully, it's not a pest - I'm assuming these things grow in size?

The hitchhiker ones usually stay pretty tiny, but if happy they can reproduce in aquariums.