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.
Krill survive in the Southern Ocean which surrounds the Antarctic continent.
Antarctic krill was created in 1850.
Euphasia surperba, Antarctic krill, survive in water ranging from −1.3 to 3 °C (29.7 to 37.4 °F). If the animal wants 'warmth', it moves into warmer water.
You're thinking of Antarctic Krill, Euphasia supberba, the base of the food chain in the Southern Ocean that surrounds Antarctica.
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.
Codfish eat herring and lobsterpolar cod feed on plankton and krill.
Similar
krill
Fish, krill, copepods.
Too many to count.