This
Karl means Ompok siluroides. That's what most likely this is. I have had 4, one amelanistic: http://www.planetcatfish.com/forum/viewtopic.php?f=13&t=30936&hilit=+ompok
AFAIK, bimaculatus is rarely if ever exported out of south India. But I am simply repeating after an Indian hobbyist ichthyologist Balaji (Shovelnose on PCF).