They are whales major food source, without them they would die
Antarctic krill was created in 1850.
Antarctica is a continent and krill are sea animals. The liquid sea is always warmer than the ambient temperature in Antarctica. The cold Southern Ocean is a natural habitat for krill.
Euphausia
Krill are measured in tonnes, and the number is large enough to outweigh any of their predators. Krill are a key to the Antarctic food chain in Antarctic waters.
There is no commercial krill fishing in the oceans that surround the Antarctic continent -- the Antarctic Treaty forbids it.
krill
Similar
The Antarctic environment is the natural habitat of the Emperor Penguin.
Krill survive in the Southern Ocean which surrounds the Antarctic continent.
This animal -- Euphasia supberba -- is the base of the Southern Ocean's food chain. It is the natural habitat for this animal. Thirty one other species of krill populate other oceans.
Too many to count.
Fish, krill, copepods.