Marine animals are creatures that live in oceans, seas, and other saltwater environments. They include a wide variety of species, such as fish, whales, dolphins, sharks, and sea turtles. These animals have adapted to life in water, developing features like fins, gills, and streamlined bodies to help them swim and breathe underwater. Many marine animals play important roles in their ecosystems. For example, coral reefs provide habitats for numerous species, while plankton serves as a primary food source for larger animals. Understanding marine life is crucial for maintaining healthy oceans and biodiversity, as many species are threatened by pollution and climate change.