Question

what are phytoplanktons ?

Answer 1

Phytoplankton are the autotrophic components of the plankton community and a key part of oceans, seas and freshwater basin ecosystems. The name comes from the Greek words φυτόν, meaning "plant", and πλαγκτός, meaning "wanderer" or "drifter". 

Answer 2

Explanation:

phytoplanktons found in oceans are free floating microscopic organisms that perform photosynthesis. Desmids , golden algae and cyanobacteria are examples of phytoplanktons.