Why in a marine food web the total biomass of algae far outweighs the total biomass of all the killer whales?

In a marine food web, algae serve as primary producers, converting sunlight and nutrients into energy through photosynthesis, which allows them to grow in vast quantities. This high productivity results in a significant biomass of algae that supports a diverse array of herbivores and predators. In contrast, killer whales, as apex predators, occupy a higher trophic level and are fewer in number, relying on the energy and biomass produced by lower trophic levels. Thus, the total biomass of algae far exceeds that of killer whales due to the inefficiencies of energy transfer between trophic levels, as only a fraction of energy is passed on to higher levels.