🐟 A fish is a cold-blooded aquatic animal that typically has gills, fins, and scales. They come in various shapes, sizes, and colors, inhabiting diverse habitats such as oceans, rivers, and lakes. Fish play a crucial role in ecosystems, serving as both predator and prey. They have adapted to their environments with specialized features like streamlined bodies for swimming, camouflage for protection, and lateral lines for sensing movement in the water. Fish are an important food source for humans and are also kept as pets in aquariums.