1st pic looks like a hydrocoral, harmless/good.3rd are a type of hard tube feather duster. Harmless/good. Have a few in my tank. Not really attractive like a regular duster or Coco worm, but just an added bonus of live rock
Yup. Feather dusters, i have a ton of different colored micro dusters, theyre neat. Filter feeders and good water cleaners. I have slightly larger ones in the sump, probably a half inch feathers.
