It a river in Mali. Close to Guinea. It where this bichir was caught. That's why is called Sankarani lap or at full name Polypterus bichir lapradei "Sankarani/Guinea".
Nice PBB as always! BTW, how the clean/wash the red sand when they become dirty? I plan to put red sand as well but my father objects as he says it's a really troublesome chore to do? Does anyone have any suggestions that might convince my stubborn father?