<p>Do you know¿<br><br>Which fish can communicate with an octopus?<br><br>Or which bird can fly 500 miles per day?<br><br>Or which sea creature can release a powerful electric shock?<br><br>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. <br><br>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.</p>