Has anyone had luck with a trap. I have ready they are unreliable andmostly catch fish. But I have read about just placing a glass drinking glass with a piece of shrimp in it. Place the glass near a ledge close to its home and in a day or so it will find a way to get into the glass but will not be able to climb out since glass is too slick. A fish will be able to get out and I am quessing a real shrimp can get out but a mantis is not a true shrimp.