Plankton are small organisms that float or drift in water. They are divided into phytoplankton, which are plant-like organisms capable of photosynthesis, and zooplankton, which are animal-like organisms. Plankton are extremely important as they form the base of the marine food web, with phytoplankton providing an energy source and zooplankton consuming phytoplankton and other zooplankton. Areas with high levels of nutrients in the water typically contain more plankton.

1. Plankton Why are they so important?