Black Caiman

Although they are listed as least concerned by the IUCN Red List, black caimans once were hunted to the brink of extinction.

An excerpt from the article 20 facts about black caiman
Between the 1950s and 1970s, they were falling victim to excessive poaching because of the unique and valuable pattern on their skin, decreasing their population by 99%. Fortunately, their numbers were replenished.