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For identification
Caitlin3279
little Ksyusha? ))))))
Maria
John828
You have a glass rose Aiptasia on your stone.
You need to fight them.
Andrea
Can I join in this topic? What is this? Translucent tentacles with greenish balls at the tips, arranged like rosettes from which light brown "biomass" grows, in which similar small rosettes can be observed. They threw some kind of slime-threads on the disco ball, which made it all crooked. I quickly moved them away, and it seems to be recovering. Photos as best as I could with my phone...
Eric
It's hard to see, take a look at this, it might look like it was in that thread.
William1830
It is definitely hard to see, it could be a variety of Pseudocorinactis, or it might be Majano.
Adam4310
Tami
Oleg Vladimirovich, if it is still relevant...