No one said you can’t and no one said you can. The link was for informational purposes. I’ve seen them co-exist in tanks, I’ve also seen them wipe out expensive live stock.
I guess we can’t have a differing opinion. I hope people make an informed decision before adding anything they are not educated about to their tank. The majano anemone CAN be a very bad pest. The beginner should know these things before they blindly put them in their system. But Hydnopora can also wipe out many expensive corals, so can urchins.