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Hydroids or Aiptasia?

steph

New member
Joined
Mar 4, 2021
Messages
21
I have what I thought was aiptasia growing on a rock. Now, I am not so sure as they seem to look a bit like colonial hydroids. They appear to be green (almost lime green) and have stayed about the size of a pinhead for over a month.
Can someone confirm what these are?

thank you!!
 

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