The given pyramid represent pyramid of biomass in an aquatic ecosystem. In this pyramid, biomass of phytoplankton, i.e., producers (represented by A) is smaller than that of zooplanktons, i.e., primary consumers(represented by B). Phytoplanktons support zooplanktons as latter feed upon m.

The total dry weight of total amount of living matter at each level (from producers to consumers) is represented by pyramid of biomass. The herbivores obtain second position if pyramid of biomass is upright.

Depending upon nature of food chain, pyramid of biomass is inverted or upright. The total dry weight of total amount of living matter at each level (from producers to consumers) is represented by pyramid of biomass.