About four years ago, I had a male Wood frog that I had captured from a pond near my house. One day, I observed something very peculiar coming out of the bottom of the frog. Instead of normal feces, there was a clear, small bubble that was either full of fluid or air (it was hard to tell). As if that wasn’t weird enough, there were these tiny white “things” in the bubble, jumping rapidly around; they closely resembled worms. This mysterious bubble lingered outside of my frog for about 5 minutes and then gradually went back in. Afterwards, I never saw it again.
Does anyone have a clue as to what this weird bubble was? The first thing that came to mind was some kind of parasite or nematode. I tried doing some research, but couldn’t ever find anything.