Help newbie needs to ID hitchhikers

[LaLa]

I bought this rock with clove polyps.the clove polyps are in rough shape don't think they are gonna make it but I noticed on the underside of rock this hair looking polyps...dont know if friend or foe.Also on top of rock are these spaghetti like worms that come out and I think a feather duster. I also see this white feathery looking polyp on top right of rock.im Hoping I didn't by myself problems.thank you

 

[Aquarian]

Photo one could be a hydroid or a filter feeding tube worm aka feather duster. If the tube is flexable and fleshy it’s a hydroid.
Photo two is a feather duster. (It also has a ridged tube)
Photo three I believe is a sponge
Photo four is Foraminiferans
You can find them all here. https://www.lionfishlair.com/hitchhikers-guide/