MIA: our new Imperator Angel

I was thinking the same thing, I think maybe the BTA ate it, I put a piece of shrimp to feed it and it ripped it off the feeding stick !!! I also noticed the base (foot) of the BTA was much "taller" than usual, and the BTA much "happier" than normal (big bubble tips)
As for the RMS250 being too small, I realized that, we were thinking that by the time he gets decently big (7-8" or more) we would get a second tank installed in the living room wall (other side gives to an unused corner of the garage ...) that would be a FOWLR and most likely 200 gallons, then he could go in there

 

The seabae anenome is a rough invert. I fed the one I had a while ago some silversides but then he moved inside the reef and I could see he wasn't moving. I pulled him out and he was dead. Caught him just in time before he would cloud up the water which they are noted for doing. Some people say it's toxic but I heard it isn't fatal to the inhabitants but I'm not taking any chances. What if I was out of town? No more anenome's for me, I like to sleep at night.8)