Evicting a tube anemone.

[tebstan]

They can create elaborate tunnels out of their tubing under the rock. Just like feather dusters, removing them can be tricky and harmful. But, if you want him gone... it's probably a risk you're willing to take.

You could try aggravating him enough that he ejects out of his tube, just like a duster would. Theoretically he could build a new tube and survive, if he were protected from predators. Remove the remaining tube as well as you can - they're gross looking and indigestible to clean up crew.

If he won't go willingly, you'll have to remove the rock protecting him. Either way he may not fair well. When I added mine I knew they'd be pretty permanent residents.