WORMS?? good or Bad??

[chevyjaxon]

hi, as my tank matures more and more Im noticing other creatures coming from my live rock, worms. ive noticed 2 today one is grey and has little spikes all over itself the other one is white and seems to stretch itself from one rock trying to reach the next but it cant so it just gives up and tries again 30 or so seconds later also ive noticed my starfish isnt spreading out as good as it used too it just kinda clings to the glass in a crumpled ball
are worms ok to have? is my starfish dying?