How do fish survive in the water in the polar regions?

Fish in polar regions have adapted to survive in cold waters through various physiological and behavioral adaptations. Many species produce antifreeze proteins that prevent their blood from freezing, allowing them to thrive in sub-zero temperatures. Additionally, some have a slower metabolism and a reduced growth rate, which helps them conserve energy in the nutrient-scarce environment. Their adaptations also include specialized gills and body shapes that facilitate efficient movement and feeding in icy waters.