"Schwarzflossee" is a Dutch word meaning black fins. It is a name that has been applied to a strain of australe with darker fins than the normal chocolate strain. It is a robust, prolific, and attractive aquarium strain of australe." - Lee Harper
"One popular strain has been developed by Ruddiger Schafer of Germany through line breeding and is called "Schwarzflosse". It is a very dark chocolate color with a blue-black color in the caudal fin. It is a most striking fish and quite desirable." - Harry Specht