Yes they do. Plankton inhabit oceans, seas and freshwater bodies such as lakes and ponds.
Phytoplankton, which is a microscopic and autotrophic organism. There are trillions of phytoplankton in the ocean.
The answer to your question is phytoplankton
There are a wide variety of ocean creatures which are known to eat phytoplankton. However, krill are believed to be the main organisms which feed on phytoplankton.
No because phytoplankton need sunlight to photosynthisize.
Pacific Ocean
Phytoplankton.
phytoplankton
Phytoplankton
If the number of phytoplankton decrease the food chain would decrease in the ocean.
Phytoplankton feeds most of the life in the ocean . (:
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Phytoplankton absorb red and blue light, but reflect green light. Therefore, the presence and amount of phytoplankton can indicate the health of the ocean.