Jaguars are already one of the world's most endangered species, but one of the two cubs on display at Zacango Zoo in Mexico is even more rare because it is melanistic.
That means the animal appears completely black, although their characteristic spots are still faintly visible.
The two cubs were bred from different mothers and they are the first of their species to be born at the zoo for a decade.
Still too fragile to wander freely around the zoo's jaguar enclosure with their parents, the cubs currently receive round-the-clock care from keepers, who give the furry felines a specialist diet of milk, chicken and calcium supplements.
Once revered by pre-Colombian cultures, Mexican jaguars now face possible extinction because of a loss of habitat and human demand for jaguar fur.