I had the same thing happen to me Randy. Kept hearing clicking noises at night and was told I had either a mantis shrimp or a pistol shrimp. It turns out I have a pistol...so I went and got a yellow watchman goby last week. I've been told by some members that it may take a while IF they hook up, so we'll see. I'd leave him - from what I understand, they won't hurt anything. Mine apparently hijacked some LR a long time ago....haven't added any new LR for at least 8-10 months.

BTW - how long have you had the yellow watchman?

Good luck....