I have a 4-5'' Oxydoras Niger catfish. I have not seen him in at least 3 weeks. He used to come out at night to feed when I put shrimp pellets in. It is possible he comes out in the wee hours of the morning when I'm asleep. I have a big driftwood that is almost 3 feet in length. He may be hiding somewhere in there with my striped raphael catfish. Also sharing the driftwood is a synodontis decorus,2 synodontis eupterus, and a banded leporinus. Am I being paranoid in thinking something happened? Could he just be hiding? I am thinking about moving the drifwood and inspecting during my next water change. Why would he suddenly stop coming out? I am thinking maybe my jack dempsey had chased him. I am rehoming the jack tomorrow.