Can anyone ID these?

hereticlosmorte

Feeder Fish
MFK Member
Mar 1, 2010
995
1
0
Ontario, Canada
trying to figure out what exactly I have here, and whether it's ok or something I do not want in my tank.
It is on the same piece of live rock as my kenya tree, so I don't want there to be any issues between.

9a5d2d1b-99d2-4c87-90f5-d4acff23e8b3.jpg
20140730_170931.jpg

Also, there seems to be another type growing right next to it, anyone have a clue on this? sorry the picture isn't better focused at that magnification.
20140730_170953.jpg

Lastly, I noticed a couple of these one night, am I safe to assume that the long proboscis/tentacle is a peanut worm? Or is this something else entirely?
20140719_073818.jpg

Thanks ahead of time guys!

9a5d2d1b-99d2-4c87-90f5-d4acff23e8b3.jpg

20140730_170931.jpg

20140730_170953.jpg

20140719_073818.jpg
 
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