Whales are not actually fish; they are mammals. Although they live in water like fish, they differ significantly. Unlike fish, whales are warm-blooded, have lungs for breathing air, give live birth, and nurse their young with milk. They are part of the cetacean family, which also includes dolphins and porpoises.
Fish, on the other hand, are cold-blooded, breathe through gills, and typically lay eggs. The two groups have evolved to adapt to aquatic environments, but they are distinct in many ways due to their different classifications.
