You'll find fascinating information about all kinds of whales and dolphins, including how they breathe, swim, hunt and eat. Discover how dolphins can find their way around in dark water, how deep whales can dive and how fast they can swim. Amazing underwater photography gives close-up views of these incredible creatures, while lively illustrations provide an insight into their habits. This book contains descriptions of Web sites specially chosen to take you further into the subject in a fun and informative way. You can find links to all the recommended sites by using the Usborne Quicklinks Web site included with the book. Usborne always watches their links and updates them. This book, however, works perfectly well as an outstanding conventional reference book without using the internet at all.