this is an article from 2012 but I just came across it and thought it was interesting. A cheetah which has no spots and basically looks like a skinny lioness. Cool photos on the link.
The lesser-spotted cheetah: Rare big cat without traditional markings sighted in wild for first time in nearly 100 years | Daily Mail Online
The lesser-spotted cheetah: Rare big cat without traditional markings sighted in wild for first time in nearly 100 years | Daily Mail Online