No idea what this is...

I have two of these polyp like things, I don't know what they are, they have not grown that much since I discovered them and they do not seem to be spreading.
I attached three pictures of the two unknown organisms (they are the ones with the green stripes). Any help would be appreciated.

 

Pictures are kind of fuzzy but they look like rock flower anemones to me.

 

Cup coral or maybe baby plate coral?

 

I was going to say that, from the tentacles.

 

I'm thinking plate coral, three

 

wow i hate to go behind you 4 with a different opinion but i've seen so many in my life, i gotta say its a glass aneome but i hope you guys are right the mouth just don't look likea plate.

 

Thanks for the help, it does look similar to a baby plate coral.
I used to think it was a glass anemone too but the entire plate has tentacles unlike most I have seen which only have a ring or two of tentacles around the outside (but I could be wrong), it also has been growing pretty slowly and hasn't spread unlike most glass anemones.

 

if its a plate when touched it will contract into a hard plate, if there is a hard plate its a plate coral if it disappears into a crevice its an anemone

 

Glass anemones are aiptasia, and that's definitely not aiptasia.