That anemone is too small for your maroon. Maroons are very rough on anemones and could love it to death. If your bta shows signs of stress, you will need to seperate them or you could loose it. If however your maroon is very gentle (doubtful) it could be ok. Just keep an eye on it. Host anemones should be 3-4X the size of hosting fish as a general rule.
I have been reading about that. For the time being everything seems fine. In my opinion he isn't being to rough. From what I see, for now, he is just gently rolling in it and darting in and out to keep everything away...it's kinda funny. If the RTBA starts looking ill, I will certaily separate the 2, in whatever means I need to inorder to preserve the RTBA. Thanks for the input