I've had him in my tank with 6 emerald corydoras and i just cant seem to find what corydoras species he is! Maybe you guys can help. The dark line is a blueish coloration.
Take a tour around Planet Catfish. If you can't find it, post the photos and someone will ID it for you. I took a quick look there and didn't see it, so they're your best best unless someone here has one just like it.
I only have one because I got it almost two years ago. The stripe isn't dark, it was the camera. Its a very light blue especially when the light hits it. I've been looking on that site, I can't find it!
Looks like a Corydoras Rabauti sortof, but the black doesnt run into the fin. It definitely could very well be a bronze as i have searched images and found quite a few that matched the look.
It looks like a bronze C. aeneus. These fish are found in many countries and sometimes they vary somewhat in color from one place to another.
What most people get from the lfs is a farm raised, gray-green fish that is called a bronze. They are no wheres near as attractive as the wild caught fish.