How Do Fish Adapt To Cold Water in the USA
Fish living in cold climates have evolved an adaptation to keep from freezing: antifreeze proteins. Because of its salt content, seawater freezes at -2°C, not 0°C. Because fish are ectothermic (cold-blooded) animals, when the water they live in is below freezing, they need a way to keep themselves from freezing. How do fish survive in…