Plankton are tiny organisms that float in oceans, rivers, and lakes. They are a crucial part of the aquatic food chain, serving as food for larger creatures like fish and whales. Plankton can be divided into two main types: phytoplankton, which are tiny plants that use sunlight to make their own food, and zooplankton, which are small animals that feed on phytoplankton and other small organisms. These microscopic life forms are essential for maintaining the health of our planet. Phytoplankton produce a significant amount of the Earth's oxygen, while zooplankton help recycle nutrients in the water. Together, they support diverse ecosystems and contribute to the overall balance of life in aquatic environments.