How do fish breathe? Is coral a plant? Which sea creatures are poisonous? The answers to these questions and more can be found in this fact-filled book. Simple, easy-to-read text, detailed photos and lively illustrations introduce this fascinating topic. Also includes links to recommended websites to learn more.

Chapters in this book include:
- Seas and oceans
- Underwater life
- Who eats who?
- Hiding
- Coral reefs
- Coral reef animals
- Living together
- Poisonous animals
- Sharks
- Rays
- Whales
- Dolphins
- Deep sea
- On the move
- Cold oceans
- Waves
- Currents
- Tides
- Coasts
- Seashore life
- Dangerous seas
- Boats and ships
- Exploring the depths
- Unknown seas
- Shipwrecks
- Using the oceans
- Dirty oceans
- Emptying the oceans
- Getting warmer
- The future of the oceans
- Undersea facts and records

Felicity has worked for Usborne for over 30 years and has written and edited hundreds of titles, from books on tractors to genetics, from Shakespeare to mental health, and plenty of sparkly unicorns. Felicity is an expert in making tricky topics friendly and accessible to young children and recently has been writing books that celebrate feelings, friendship, empathy, families, and diversity. When she's not writing or researching very specific details on dinosaurs, Felicity can be found tramping through fields and forests foraging for food or just curled up with a bag of Twiglets, a couple of cats and a crossword.