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.
I didn't mean to pass this off as fact, I meant this as like a "this is what I found through internet research and I made assumptions"
The reason I'm saying P. a. a. (PAA) are sold the most, is because out of all the lungfish pics they are mostly PAA, and the reason I think most of the pic are PAA is because PAA are the largest P. aethiopicus have that spangled pattern. When you say the congicus snout forrm a line, how big are the spots? Is there really a difference in spot size between PAA and PAC? Is it just a coincidence that all the largest ones have the spangled pattern (that question isn't pointed, I know it sounds that way)
What would you label the picture I posted as?
As for the sentence were you said "
As for the patterns differents, all will end up with tiny little mosaic like patterns." There are some pics of youngs ones with spangled pattern put they are on WW.