Tiny green cnidarians?

The Kapenta Kid

New Member
I have some tiny green creatures growing on my LR. They are only about 1 mm across, but under a hand lens they look just like little zoas, which is what I took them for at first. However, they have long thin tentacles unlike a zoa. All parts are emerald green except for the brown spot in the middle, the mouth? They grow as individuals, but in small groups close to one another.
Too small to be photographed with my equipment. Any ideas?
 
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