Hitchhiker? ID please

[MAXreefer]

Just dipped one of the corals I picked up and saw a couple of those coming out of the rock.

What are those?
good or bad?

Thanks for any input
Michael

 

[Uncle Salty 05]

Good.
Scavenger.

 

[MAXreefer]

Thank you.
They look pretty ugly and creepy for sure but good to know they won't harm the corals

 

[kidkams]

deff good they will clean some of the detrious from your tank

 

[billsreef]

Brittle star