To Kill Or Not To Kill-please help in neumerous IDs

hey guys, ive had my tank cycling for a little bit now and im starting to see some blooms of soft corals and some other little invertibretes

can you help me identify/figure out wheter or not there good or bad
thanks
.....


~i know this is a hard worm, i have a bunch more like it same color and everything, are they good or bad and can you have too many?


white/tan puss looking bulb what the heck is it?


Feather duster look alike


not exactly looking like pic #1


like the above pic but larger and more extended


so if you could please help me out in identifying these guys and wether or not they are good or bad
thanks alot for the help

and please pardon my newb questions.. 8)

 

and sorry for the low qualaity on some of the pics im still learning the manuaul settings on the camera :-/

 

1. zoanthids=good
2. feather duster=good
3. sponge=good, harmless filter feeder
4. you are correct, good feather duster
5. majano=BAD get rid of him
6. aptasia=BAD get rid of him

 

mission i had an aiptasia in my FOWLR yesterday, now its gone will my fish eat it???

 

The last two look like aptasia, the first one looks like button polyps, the feather duster look alike may just be a small feather duster tube worm, same thing with the hard tube things. And as for the growth not sure.

 

Okay, all the feather dusters and hard worms are good. Great catch with those. Same goes with the polyp corals, an even better catch.
I am not sure about the puss thing in pic #3, so I'll leave that to someone else.
Pics 4 and 5 are aiptasia. Its a nuisance anemone and needs to be removed. Not catastrophic, but will take over your tank and sting corals given time. Easiest way is to get some joe's juice and hit them with that.

 

it could have moved

 

thanks alot everyone ill make sure to get rid of the aptasia and majano,

ummm but HOW do i go about doing this, scrape them off.... boiling water..
lmk
thanks