how many krill are in the ocean
Collectively, krill make up the single largest concentration of biomass in the oceans. At any one time, there are 400 million tonnes of them swimming about in every ocean of the world. Their place in the ecosystem is as the second tier in the food pyramid.
Simply put, many oceanic life forms depend on krill. Importance to the Antarctic Ecosystem Pink and opaque, Antarctic krill (Euphausia superba) are among the largest of the 85 known krill species. Their estimated numbers range from 125 million tons to 6 billion tons in the waters around Antarctica. During certain times of year, krill congregate in swarms so dense and widespread that they can be seen from space.