The Fish With Clear Blood
The impossible claim This fish has no red blood cells and no hemoglobin — its blood is nearly clear. It’s the only vertebrate on Earth like this. The verified facts The Antarctic icefish (Chaenocephalus aceratus and relatives, family Channichthyidae) are the only vertebrates that lack hemoglobin and red blood cells. Their blood is nearly transparent — essentially clear plasma. In −1.8 °C Antarctic water, oxygen dissolves so well that the icefish survives on oxygen simply diffusing into its blood plasma (~10% the capacity of red-blooded fish). ...