U sure about this? Most commonly sold marble lungfish is the protopterus aethiopicus congicus and even albinos and leusistics are available and some rare piebald too. Sometimes protopterus aethiopicus are being mix in the batch during export as all are just being labled as marble lungfish. As for the patterns differents, all will end up with tiny little mosaic like patterns. How to tell the difference is lookinh at the head patterns. A protopterus aethiopicus arthiopicus will have a small dotted or freckled like patterns all over the snout unevenly. While protopterus aethiopicus congics will have patterns on the forehead running through the snout, forming a line. As for the pic of protopterus aethiopicus mesmaekersi that u have is actually the opposite. Protopterus aethiopicus mesmaekersi have smaller dotted patterns and are lighter compared to the protopterus aethiopicus congicus which is much larger. Both fish can be found in the same area, thus they usually get mix up.