Why is a leopard with no spots called black panther?

A leopard with no spots is often referred to as a "Black Panther" due to a condition called melanism, which results in an excess of dark pigmentation. This makes the animal appear black, though its distinctive rosette patterns may still be visible in certain lighting. The term "black panther" can also refer to other big cats, such as black Jaguars, that exhibit similar melanistic traits. Ultimately, the name reflects the animal's dark coloration rather than its specific species.