My Oglobin - The Red Fishes Blood

Ice fish have evolved to do without a hemoglobin because of their low metabolic rates in this cold environment. They've also evolved other cardio vascular adaptations, including enormous hearts with cardiac rates that arete four to five fold greater than that of red blooded species. And again, these are strange looking fish,. Sometimes they look extremely translucent. Other times is just kind of a weird looking gray, big headed fish.