Super tiny feather duster or something else?

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MysterioMask

Aquarium Advice Newbie
Joined
Jun 26, 2017
Messages
9
I can't tell what these are. Is this a feather duster , a type or coral or something else. This photo I am using a magnifying lens just to see it. It's maybe about the size of a small pin head or slightly larger in size. Otherwise almost unnoticeable. After starring at it for a length of time I watched it close and pull back rapidly and then open itself back up. It is on a piece of Coraline frag slightly larger than my thumb. If it's a feather duster I was not aware they could be so small. But I am no expert.

I just started a new tank maybe a month ago and have been letting it cycle and have not added any animals except live rock and coralline frags.

Also. I don't have a photo of this because it was too fast and hiding but I saw a tiny looking bug thing maybe 2 millimeters long running around on a piece of rock looked like a tiny millipede without that many legs. It seemed somewhat thin ran fast and was darkish in color. Any clue on either? IMAG2578_1.jpg
 
The tiny bug like thing is a pod. See link
You Can't Tell Your "Pods" Without A Program by Ronald L. Shimek, Ph.D. - Reefkeeping.com


It`s hard to see whether it`s a mini duster or aiptasia. Aiptasia is a nuisance in the tank. A better and more direct picture would help.
Here is another photo. It's not easy to take these given how small they are and almost a white/ clear color. Although this larger orange one showed up today. I'm pretty sure that's a feather duster as it looks like its in a tube like structure and larger than the tiny ones. But would like confirmation .IMAG2590_1.jpg20170721_171540-20170721-181022738_1.jpg
 
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