What kind of producers live in the ocean?

seaweed,phytoplankton, diatoms,Crill, algea, Seagrass

, dinoflagellates (a single-celled organism with two flagella, occurring in large numbers in marine plankton and also found in fresh water), coccolithophores (a single-celled marine flagellate that secretes a calcareous shell, forming an important constituent of the phytoplankton. )