The oceans that surround Antarctica are the coldest on earth, and the most productive on earth.
Scientists continue to study the question you ask, because so far, there's no clear answer. We we have learned, however, is that most life lives longer in cooler temperatures than at hotter temperatures.
No marine life live on Antarctica: marine life lives in open water. However, marine birds and marine mammals do visit Antarctica's beaches to breed.
The Southern Ocean that surrounds Antarctica has the most marine life. There is no marine life on the continent, unless you consider penguins in your marine life list -- they come to Antarctica's beaches to breed.
Penguins, (various other bird species nest during the antarctic summer), several species of seals, whales and other marine life abound in the waters around antarctica, whose cold waters are rich in microscopic marine life (krill, etc), a good source of food for fish and large marine mammals.
There are no plants in Antarctica. Seals are marine animals and use sea life not land life, to survive.
There are no foxes in Antarctica. The only creatures that live there are penguins, seals, whales, and other marine life.
The protein-rich Southern Ocean is so rich because the food chain there is abundant. The food chain is short, and for months out of the year the ocean is frozen over, which removes some of the larger predators from the food chain.
Marine biologists helps us to understand the natural variability in marine ecosystems and to detect whether changes that occur are natural or induced by the actions of humans.
There is no animal life in Antarctica: it's too cold. Some marine animals and birds do breed on Antarctica's beaches during breeding season.
You find the most life around Antarctica in the great Southern Ocean in the form of marine life. The continent is too cold to support any kind of animal life.
Marine means sea or ocean -- salt water. Antarctica is a continent. No marine animals live on any continent.
Neritic Zones
The Paleozoic Era, because rich fossil evidence displays that early life in the time of the Paleozoic Era, there existed a dicersity of marine life.