Do you know...

Which fish can communicate with an octopus?

Or which bird can fly 500 miles per day?

Or which sea creature can release a powerful electric shock?

Test your knowledge of the world's oceans with over 200 questions that reveal the wonders of our natural world, inspired by the ground-breaking Blue Planet II series. And discover behind-the-scenes stories about how the series was filmed from the BBC Earth team.

With hours of fun quizzes to enjoy, this curious exploration of ocean wildlife is perfect for getting children aged 7-9 excited about our natural world.