Okay, I found Shane's thread with a photo identical to the fish in question
Here. Of course, there's no further ID, so I guess he goes into the files as Unidentified for now. I will now go back to the search page and look at some more stuff.
Silurus, as you can see from Shane's photo, it apparently isn't the
nudirostre. I had already ruled that out, as
nudirostre has more of the "stellar" spotting than the fish in question, and lacks the light band on the caudal. I suppose that those could simply indicate an immature specimen, as the fish I shot was only about 2 inches.
Shane, I have many times on other forums suggested to New Forum Members that they try the "Search" button first. However, I did it nicely.

Of course, I should have known better, too, but we all get lazy sometimes.
Cichlid people say "that's what I bought it as." Catfish people say "that's what I bought it as, but it's actually....".