Extreme oceans

From ugly eels to gigantic worms, mysterious narwhals to majestic penguins, learn about the creatures that survive the most extreme ocean environments in this new title from the exciting In Focus: Oceans series. Did you know that walruses use their tusks as tools to dig up food on the seafloor? Or that the giant squid has the largest eyes of any living creature? And did you know that there's a deep-sea octopus named after Dumbo?.