Phytoplankton is the producer, and zooplankton is the primary consumer in the marine food chain.
The producer in the food chain is phytoplankton. They are the primary producers in the ocean and form the base of the food chain by using sunlight and nutrients for photosynthesis.
The primary consumer in this food chain is zooplankton. Zooplankton consume phytoplankton, placing them at the first trophic level of the marine energy pyramid.
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