Cool/Weird worm thing

Hey, Had my tank up since May/June and all of a sudden I saw this crawling around. Any ideas?

Also to the right of it is a small starfish like invertabrate, I have them all over my tank with varied numbers of legs, what are they called?

Thanks
-Eddie

 

Worm is a Bristle Worm.. could be good or bad, but often not something to worry about.
If you get too many of them, cut down on feeding.
if they get too big, call for help!

The star is an Asterina Starfish, they'll stay small, but can multiply quickly under the right circumstances.. Some can be harmful to your corals, but often they are OK.

In both cases, keep an eye on them, watch for damage on your corals. If you find the starfish on your zoanthids, remove them.

 

Cool, much appreciated! usually the starfish are on the glass so i think they are doing more good than bad for now. Thanks!