Strange brown disk

[Boj4k]

We bring in shipments of coral weekly so there's lots of desirable and undesirable things in the system, recently discovered these brown discs with tentacles and a slight oval shape. approximately 5x10mm for the disk and the tentacles on average 10mm with a few longer and some shorter.
They seem to only be in one specific part of only one section of a 800 gallon system which is the same spot that aiptasia thrives the best except they're much closer to the lights than the aiptasia

 

[ISpeakForTheSeas]

Reminds me of the anemone in the link below - I still haven't been able to figure out a proper ID for it:

Small aptasia with big foot?

I have started to see these little anemones pop up, i dont think they are the standard aptasia… They have a foot that looks like a little mushroom when the tentacles are not fully extended. Any ideas? @vetteguy53081

www.reef2reef.com

 

[Boj4k]

Reminds me of the anemone in the link below - I still haven't been able to figure out a proper ID for it:

Small aptasia with big foot?

I have started to see these little anemones pop up, i dont think they are the standard aptasia… They have a foot that looks like a little mushroom when the tentacles are not fully extended. Any ideas? @vetteguy53081

www.reef2reef.com

Should've taken pictures of the others I saw, but there was one I could observe from the side and it was nearly flat not like any aiptasia I've ever seen before

 

[EeyoreIsMySpiritAnimal]

Should've taken pictures of the others I saw, but there was one I could observe from the side and it was nearly flat not like any aiptasia I've ever seen before

Idk, but it's pretty!

 

[ISpeakForTheSeas]

Should've taken pictures of the others I saw, but there was one I could observe from the side and it was nearly flat not like any aiptasia I've ever seen before

Yeah, it's not Aiptasia, but it does seem to be an anemone of some variety, probably the same kind as in the thread above - to show why I say that, some pics from the thread:

For a side-by-side comparison:

 

[19Mateo83]

I had these and we never identified them. What I do know is that these little buggers will sting corals and they will start to multiply rather quickly. Also peppermint shrimp will not touch them.