Thanks for the replies. I don't know what happened. They just vanished. I had a very small chevron tang, a neon pseudo and an algae blenny. I found the blenny as he was being consumed by my 6 brittle stars. None of the Brittles ate the fish. I have had them for years and none are like the green monster brittle stars. I just don't know what happened. My pseudo had been with me for 3 years. I just bought the blenny and he seemed to be fine. The tang is the main culprit. I had bought him very recently. Maybe he had some undetectable disease that wiped everything out. Oh well, I will be starting over again. This time I will buy all of them at the same time. I hate starting over.