^ I think rotkeil has just kind of become a catch-all term for severums showing a ton of red in the face/neck area. I would have called it the same thing just by looking at it, out of habit.
I disagree about the blue face and yellow anal fin, though. Some of the severums show a blue sheen on their face, but not all of them. This applies to green/turquoise severums as well. Also, the anal fins are sometimes bright orange/red, as you can see on these fish: http://amazon-exotic-import.de/Gallerie/Cichliden/Seiten/Heros%20spec.%20Red%20Shoulder.htm
I disagree about the blue face and yellow anal fin, though. Some of the severums show a blue sheen on their face, but not all of them. This applies to green/turquoise severums as well. Also, the anal fins are sometimes bright orange/red, as you can see on these fish: http://amazon-exotic-import.de/Gallerie/Cichliden/Seiten/Heros%20spec.%20Red%20Shoulder.htm
