The black panther is actually the color variant with the leopard (Panthera pardus) and also the jaguar (Panthera onca). Black panthers of both species have excess black pigments, but their standard rosettes are present. It’s just they can not be very easily found. The disadvantages of zoos, having said that, https://socialevity.com/story20840456/5-easy-facts-about-how-much-does-a-black-panther-cost-described