The ocean ecosystem is a vast and complex network of living organisms and their environment. It includes various habitats such as coral reefs, deep-sea trenches, and open waters. Key components of this ecosystem are plankton, fish, marine mammals, and seaweed, all of which interact with each other and their surroundings. Ocean ecosystems play a crucial role in regulating the Earth's climate and supporting biodiversity. They provide essential services, such as oxygen production and carbon dioxide absorption, which are vital for life on land. Additionally, they are a source of food and resources for millions of people worldwide.