Marine life refers to the diverse organisms that inhabit the world's oceans and seas. This includes a wide range of species, from tiny plankton to large mammals like whales. Marine ecosystems are vital for maintaining the planet's health, as they produce oxygen and regulate climate. The ocean is home to various habitats, such as coral reefs, kelp forests, and deep-sea trenches. Each habitat supports unique communities of organisms, including fish, crustaceans, and marine plants. These ecosystems are interconnected, and the health of marine life is crucial for biodiversity and human livelihoods.