Ocean health refers to the overall condition of the ocean and its ecosystems. It includes factors like water quality, biodiversity, and the balance of marine life. Healthy oceans support a wide variety of species, from tiny plankton to large whales, and provide essential services such as oxygen production and climate regulation. Threats to ocean health include pollution, overfishing, and climate change. Plastic waste, oil spills, and nutrient runoff can harm marine habitats and wildlife. Protecting ocean health is crucial for sustaining fisheries, tourism, and the livelihoods of millions of people who depend on the sea.