Near disaster averted today. I checked into the Red Wolf tank to see him parked inside his favourite chunk of pipe, facing out towards the front. Nowadays he is either stationed out in the open near the top/front, or he is under cover but still visible in this exact spot. I glanced down, saw him there, and moved on...but then did a doubletake. The Wolf had something wrong with his mouth; some sort of growth? Couldn't be sure, but I was concerned enough that after watching him closely for awhile I carefully netted him out to get a better look inside his mouth.
The "growth" was a thoroughly-chewed-up, utterly dead and almost unrecognizable red bristlenose (Hypancistrus?) about an inch long. I carefully removed it with a pair of fine forceps, trying not to cause damage to the interior of the Wolf's mouth or to its teeth. The fish was remarkably easy to handle, only the occasional wiggle, and the job took perhaps 10-15 seconds. The bristlenose was curled into a C-shape, with the curve of the C towards the opening of the mouth and the head and tail both pointing towards the gullet. No idea how long it was there or how it got into that weird orientation, but it probably wasn't going to go further in either direction without my intervention. It didn't come out in one piece.
The truly puzzling part of this is that I had no idea that I had bristlenose fry...ever. I have a few adults in a stocktank pond that is currently growing out a bunch of Gymnogeophagus fry. I took a couple pieces of driftwood from that stock tank for the Wolf's tank when I moved him into it a couple months back. That's the only possible source for this unfortunate little guy. I had never seen any fry before...rarely even see an adult, truth be told...and have never seen this one in the Wolf's tank since it was set up.
So, there's my afternoon, all lined up for me: tearing down the the Wolf's tank, in case there are other spiny, crusty little hitchhikers in there. That will be followed by the much more tedious duty of going through the stock tank with a fine toothed comb...but that can be postponed till a later date.