all the fish in that river are colored really wierd. The water is so muddy you can't see the fish until they are out of it lol. Look at the stonecats. They are way darker than normal. usually they are a greyish color. Trust me. Different subspecies up here in montana. The fish is really dark, but the flash shines yellow. She's a real beauty. As skijack stated the chin barbells give it away. I find that the yellow bullheads are usually not as thick bodied either, and have a more even color throughout. Color based names can be confusing, when fish can be any color. You have to use defining characteristics to identify species positively. Caught a few more today, nothing to brag about, just a couple really small blacks, and stone cats. Going to work so we'll see what I can do next week.