Sea creatures are a diverse group of animals that live in oceans, seas, and other bodies of saltwater. They include a wide variety of species, such as fish, mollusks, crustaceans, and marine mammals. These creatures have adapted to their aquatic environments, developing unique features like gills for breathing underwater and fins for swimming. Many sea creatures play important roles in their ecosystems. For example, coral reefs provide habitats for numerous species, while plankton serves as a primary food source for many larger animals. Understanding these creatures helps us appreciate the complexity of marine life and the importance of ocean conservation.