Question

Why is phytoplankton located near the ocean’s surface?

Answer 1

hi,

here is your answer,

If the ocean did not have a thin buoyant surface layer, mixing would carry algae out of the light and thus away from their energy source for most of the time. ... Thus, most open ocean biomass, including phytoplankton, zooplankton, and nekton, is found within ~200 m of the ocean surface.