A species that lacks genetic variation but can still adapt to a changing environment is the Antarctic icefish. This species has limited genetic diversity, but it has unique physiological adaptations that allow it to survive in the extreme cold conditions of the Antarctic waters.
You're thinking of Antarctic Krill, Euphasia supberba, the base of the food chain in the Southern Ocean that surrounds Antarctica.
The Antarctic cod, or Notothenia rossii, has adapted to the extreme cold of the Southern Ocean by developing antifreeze glycoproteins in its blood, which prevent ice crystal formation. Additionally, its body has evolved a more streamlined shape and reduced swim bladder, allowing for better buoyancy in the frigid waters. These adaptations enable the Antarctic cod to thrive in an environment where most other fish cannot survive due to the harsh temperatures.
The Weddell seal survives in Antarctic waters, since the liquid marine environment is its natural habitat.
There are no Narwhals in Antarctic waters.
You can find both Leopard Seals and Weddell Seals in Antarctic waters.
Codfish eat herring and lobsterpolar cod feed on plankton and krill.
No.
The Antarctic icefish is a unique species that is exclusively found in the icy waters of the Southern Ocean around Antarctica. They have evolved special adaptations to survive in extreme cold temperatures, such as having antifreeze proteins in their blood to prevent ice crystal formation.
An emperor penguin's thick layer of blubber acts as insulation, helping it survive in cold Antarctic waters by keeping its body warm.
Hooks and Suction cups (yes I know the weirdest answer)
Penguins have a layer of fat under their feathers in order to keep warm in Antarctic air and frigid ocean waters.