Thanks. That looks like them except for the red fins and tail. I have four and they're about three inches long. I was sad to read that they are territorial. So far mine hasn't shown any aggression. They get along really well with my clowns, almorhae, and kubotai. They're so much fun to watch. They look like silver bullets shooting across the tank, very active.
If not what Mick said, I would have thought they were Schistura carbonaria. Of course, I was out scavenging for more sids and have seen sumos two days running, so I probably have them on the brain.
Kuhli Loaches are like Pringles... you can't have just one!