Along the banks of the Amazon River in Pleistocene South America, this black caiman (Melanosuchus niger) has brought down a saber-toothed Smilodon populator for its next meal. S. populator may have been among the most massive felines known from the fossil record, with a body mass reaching as much as 880 pounds, but the largest black caimans on record have surpassed that at a whopping 1,650 pounds. To this day, the black caiman is the largest living member of the family Alligatoridae (even larger than the American alligator) and the largest predator in the Amazon basin.