There were originally three in the bowl, and now he's the only one left...
He's small, so I was thinking he was some sort of pleco. The tank is decorated on the outside and the water is foggy so I can't get a good look at him other than what I have anove.
That is most definitely not a Cory....in fact, I'm almost totally positive its a Common Pleco. 3 in a .5 gallon bowl?! Geez....a single one needs around 75+ gallons, they get MASSIVE.....
If you end up rescuing him, start hunting around for someone with a huge tank that might be interested in taking him ASAP unless you have or are planning to get something very large set up in the near future. Though I'm sure anything you have will be much better then that horrible .5 gallon death rap, keeping him in too small of a tank for too long will stunt his growth, causing all kinds of problems.
Sigh. I sort of wish pet stores would stop selling these guys.....they really don't even eat much algae, if any, and they get too big for the average keeper....
Yes.....most of the time they sell these guys tiny, very tiny, which is the bad part. He may be small NOW, but he WILL grow. How quickly I'm not entirely sure, but without the proper space TO grow he'll be stunted(someone else correct me if I'm wrong, but I do believe this is when their growth-rate slows due to lack of space, but their insides continue to grow), and this can cause all kinds of health problems.
If this is a Common Pleco, which I am almost totally positive it is judging by the coloring, then you're not going to be able to keep it in even a 10 gallon for very long without running the risk of some serious stunting problems later on, provided he survives. You could probably manage a few months, but you'll REALLY want to find someone with a large tank unless you want to invest in something 75+ gallons for him as soon as possible if you really want to save this guy.