It may be red in humans and in other mammals, but octopus, for example, have blue blood and ocellated ice fish have blood that is completely clear, and in Papua New Guinea, they are green-blooded shanks.

人类和其他哺乳动物血可能红色，但比如章鱼血蓝色，眼斑雪冰鱼血透明，而在巴布亚新几内亚，它们血绿色。