The ocean is the largest habitat on Earth. It covers over seventy per cent of the planet's surface and is home over 200,000 animal species. Sea Creatures takes readers from the coastline to the ocean depths. In this book, you'll visit mudflats, tropical coral reefs and icy Arctic waters to discover some of the amazing marine creatures that call the ocean home. You can build your own encyclopedia with A Ladybird Book: the collectable series for curious kids.