96 fact-packed pages in fun Q&A format: Were there prehistoric whales? Which whale is the biggest? How do whales give birth to their calves underwater? How far do humpback whales migrate? Do whales talk to each other? How do dolphins use echoes to find food? Do dolphins have names for each other? And are dolphins smarter than humans?• Perfect for learning about marine mammal lives and life cycles• Packed with photos and high-quality diagrams• Close picture and text match with lots of labels• Carefully-leveled text for newly fluent readers• Key content vocabulary with helpful phonetic pronunciations• Includes a glossary and comprehension quizHigh-interest topic perfect for practising non-fiction reading; fantastic photos and engaging information will have kids returning to the book again and again.