Which of the following ecological pyramids is generally inverted?

Pyramid of biomass of an aquatic ecosystem (e.g., sea) is inverted because the biomass of primary consumers far exceeds that of phytoplankton. At any given moment, a small standing crop of producers (phytoplankton) supports a large standing crop of primary consumers.

Pyramid of energy, pyramid of numbers in grassland, pyramid of biomass in a forest are all upright.