The tyrannochromis polyodon's have not been available to US hobbyists in a VERY VERY long time. I believe your fish is a tyrannochromis maculiceps and not a polyodon. The polyodon's are pretty rare and 98% go straight to Europe. Unless this fish is a WILD caught fish I would probably go with tyrannochromis maculiceps just because of coloration of this fish. Hope this helps!