They can adapt quickly. Their literal flexibility. They can swim fast, eat a vast variety of food. And the fact that their ecosystem isn't being ruiuned and destroyed like the polar bears' are.
They have gills that allow them to breath.
Fish survive through adaptations such as gills for breathing, streamlined bodies for efficient swimming, fins for movement, and swim bladders for buoyancy control. Additionally, their flexible structure, varied diets, camouflage, and sensory organs enhance their survival in aquatic environments. These features show how fish have adapted over time to thrive in different habitats.
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