Really. Barely 30% of our planet is dry land, and over 70% is water. We've misnamed it.
Because we're terrestrial beasts, and rather self-centered, we focus on the world we're familiar with, the dry land. But the tiny Antarctic krill that whales eat, for example, are roughly twice the total biomass of humans. Phytoplankton may represent as much as 90% of the biomass in the ocean, and produce over 50% of the oxygen we need to live.
In fact, bacteria account for about 50% of Earth's biomass, while humans are only about 0.33% (less than 1 percent!), showing once again it's not all about us.