Phytoplankton are microscopic, plant-like organisms that float in the oceans and other bodies of water. They are primary producers in the marine food chain, converting sunlight into energy through photosynthesis.
Zooplankton, on the other hand, are tiny animals that feed on phytoplankton and other zooplankton. They are an essential link in the marine food web, as they are a primary food source for many larger marine animals.
