There's nothing 'wrong' with fishing anywhere. However, in Antarctic waters -- south of 60 degrees S -- it is forbidden by the Antarctic Treaty.
Note that Antarctica is the name of a continent, and fish are sea animals.
There is no commercial fishing in Antarctica.
fishing fishing
There is no commercial fishing in Antarctica: it is prohibited by the Antarctic Treaty.
There is no commercial fishing in Antarctica.
There is no commercial fishing allowed in the Southern Ocean around Antarctica.
There is no commercial fishing -- thus no 'over-fishing' -- in Antarctica based on the the Antarctic Treaty.
There is no commercial krill fishing in the Southern Ocean that surrounds Antarctica.
There is no commercial fishing in Antarctica.
Earth south of 60 degrees South Latitude, which includes Antarctica, is governed by The Antarctic Treaty, which dedicates the area to science. There is zero fishing in Antarctica, except in pursuit of science.
There is no commercial fishing south of 60 degrees S, which includes the Southern Ocean that surrounds Antarctica.
There is no commercial fishing allowed south of 60 degrees South latitude -- which includes the Southern Ocean that surrounds Antarctica -- meaning there is no threat from commercial fishing.
There is no commercial fishing allowed on earth south of 60 degrees S, which includes the southern ocean that surrounds Antarctica. Over-fishing is not an issue there.