[CurlyDave]

Exactly where these species came from and how they ended up a world apart--with comparatively warm oceans in between--remains a mystery, the scientists said.

No it isn't a mystery at all. Read up a little on invasive marine species and how they travel in the ballast tanks of ships.

All of the things in the pictures are small swimmers. Now think about the ships that do cold water research near the North Pole. Anyone want to bet they have ballast tanks.

Next think about what happens when it gets warm at the North Pole. That's right, it gets cold at the South Pole. Where do you think those ships go?

[JoeProBono]

Invasive Marine Species

[Young Werther]

BTW there are several species of whales that migrate to and from the Antarctic and Arctic every year. I think that they've been doing it for several hundred millennia more than ballast tanks have been traveling this route. I suppose that these fishies have been hitchin' a ride with whales.

This map shows the range of ther Blue whale and you can see that he can be found everywhere.