Will polars bears die out if antarctica melts?

Unless scientists have validated that if and when Antarctica melts, the rise in the ocean levels will flood all of the earth, then no all of the animals will not die. There are many species that naturally will move to higher ground as a matter of their natural routine, others will adapt and instinct may drive them to higher ground.

Animals also include fish, so unless the ice contains harmful toxins that can kill fish, fish and water mammals will survive.