Hitchhiker ID help

[Theflipper21]

Hope all is well, I've been running a saltwater tank for five months and noticed this fella on some live rock last night. Could someone help identify what it is and if it's its harmful?

 

[LbulletM]

Looks like a brittle star(fish). They're great for your clean up crew. People actively search them out and buy them.

 

[Theflipper21]

Thanks, that gives me some peace. I've heard of good and bad hitchhikers when adding live rock and I'm glad he's on the good team. Thanks again for the help.

 

[Darkseid]

Haven't been posting for some time so let me start with, I always envied those who have encounter with new hitch hikers in their setup. Mine has run its course