I have a rose BTA.
It is certainly the centerpiece of my tank but IME it does tend to move. It will stay in the same place for months and then just up and go walkabout. About 3 weeks ago it took a circuit of the tank and 2 days later ended up where it moved from. It will sting corals and has knocked frags down.
It was orange when I first got it but now it is darker. It was also the sixe of a baseball and is now bigger than a dinner plate!
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