Ice fish are Antarctic fish, and there are as many as sixteen species. These fish have the same characteristics, that is, they lack red blood cells and heme, so they are also called white blood fish. They usually feed on crustaceans and small fish, and basically live in the Antarctic. With the warming of the climate, nutrition is decreasing, and the ability of these fish to die is also threatened. Once they lose their suitable living environment, they will also become extinct.