在巴西北部亚马孙河流域生长着一种以血腥味食物为生的热带吃人鱼。这种令人望而生畏的吃人鱼属银元鱼类，最大的体长约６０厘米。这种吃人鱼有一副掠食者的凶恶面貌，它身体扁平，腹部呈金黄色，头部和背部为黑色，长一对赤红色的凶狠眼睛，大嘴巴，凸嘴唇，有强壮的上下腭和 There is a tropical piranha living on bloody food in the Amazon region of northern Brazil. This dreadful mermaid is a silvery fish, the largest body about 60 cm in length. This type of piranhas has the viciousness of a predator. It has a flat body, a golden belly, a black head and back, a pair of fierce red eyes, a large mouth, a raised lip, and a strong upper and lower jaw.