FS Orange Tube Anemone

[Pier Pressure]

I have a bright pink one just like that. I was told it would be fine in my tank by an LFS. We affectionately refer to him as the "whip of death" because like you say - the sting is very potent and any coral that is touched seems to die. Mine seems to stay in the corner of the tank away from the corals but I have a sand bed so maybe yours would be more likely to roam.