Could sharks really live in the waters of Antarctica?

I guess they really can. Global warming is the cause. This article claims that global warming may invite sharks to the Antarctic! This may seem a little absurd, but scientists have seen a steady climb in the teperatures of the Antarctic waters. For years, the frigid waters have kept predetors such as sharks from eating the marine life, but global warming is soon going to change that. If sharks do invade the frigid waters, the native marine life will not stand a chance. I think that this will be very bad for the native marine life and we need to do something about it.
http://afp.google.com/article/ALeqM5jRIX40o-X1q4ZKS_en8IXMoYvVhA