Brittle seas star or?

[Titleist1964]

I just emptied 20 lbs of LS into my Nano and these guys popped up to the surface. A little google and "brittle sea star" comes up.
Good or bad, and or what it is?

Thanks. Sorry first salt water tank, I'd want to remove them if they're harmful.

 

[homer1475]

They look like brittle stars to me.

Great members of the CUC, leave them be.

 

[Sharkbait19]

Agree it’s a brittle star. They are really good to have, even though you won’t see it often.

 

[Titleist1964]

Thanks guys, I started removing the LR and have seen a couple tiny lil crabs already
.

 

[JPM San Diego]

Tiny brittle stars are great.
The huge "serpent" brittle stars are a different breed. The huge ones can eat your fish.