Yes, as of the year 2000, it is listed as one of the official oceans, so there are 5 oceans now.
Yup. It's the most recently named one.
The Pacific, Atlantic and Indian Oceans all meet the Southern Ocean, the only one that does not is the Arctic Ocean.
it should be a ocean it was made on April 2000.
It all depends on the scientist. Some say it is Some don't.