I love this. I'm guessing there's a better way to choose circles, though.

Why have one for the Great Australian Bight? Just so it doesn't end up being an entire circle? That's kind of a missed opportunity to do a Philippine Sea circle and include SEA.

Edit: What about one for each continent, a couple for the Indian ocean, and then a big Pacific Ocean one that takes out of Australia, East Asia (forming SEA) and the two in America?