Other contributors have said "What continents do guinee pigs live in?" is the same question as "What are the six continents frogs live in?" If you believe that these are not asking the same thing and should be answered differently, click here
There are only seven continents, and one of them is Antarctica. It seems a safe guess that the six habitable continents are the same six on which frogs live.
The seven continents:
Africa Asia Europe South America North America Australia Antarctica