Help Id'ing This Critter

3sgterror

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I'm not sure exactly what this is our where it came from. I just noticed it tonight. It glows a little under blue lights.

I looked through the critter id thread and couldn't decide if it was a feather duster or a hydroid.

It seems to be attached directly to the rocks with no tube that I can see.

Thoughts?
PXL_20210114_213141646.jpg
 

High pressure shells: Do you look for signs of stress in the invertebrates in your reef tank?

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    Votes: 31 31.3%
  • I occasionally look for signs of invertebrate stress in my reef tank.

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  • I rarely look for signs of invertebrate stress in my reef tank.

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  • I never look for signs of invertebrate stress in my reef tank.

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