I came in to test the water for the office fish today and sadly, I found him in the condition I described in the title. He's moving around more now, which makes me a little calmer. Ok, so right after I wrote the above paragraph, whatever was hanging from him detached. It didn't really look like fish poop, because it was all white. In some of the pictures I took, it looks yellow, though. I tried to get it out with a fish net after it detached, but I couldn't find it. I think it probably got sucked up by the filter. I'll show you all of the pictures I got, though they aren't very good. What should I do? Is he safe?