Great ideas unless you have a 3 stripe damsel that seems to already know all the tricks

My 120 gallon semi reef was equipped with damsels for the first year and about three months ago I began catching all 10 of them minus the one stubborn 3 stripe in order to switch to more peaceful and enjoyable reef fish. My only problem in making this transition is this darn damsel.

I seriously wish I had a little mini harpoon! Maybe it could be built with toothpicks and a slingshot.

I'm afraid that I'm left with the dreaded plan "Z"...tear down the reef.

:(