With their sleek, powerful bodies allowing them to dive far beneath the surface, seals are among the ocean's most dangerous hunters. Readers will learn all about the lives of these magnificent mammals, from how they socialize and find mates to what they eat and how their senses work. They will also discover the man-made dangers that many seal species are facing today. The complex text in this title allows readers to determine main ideas and explain how they are supported by key details. The grade-appropriate context helps readers determine the meaning of domain-specific words as well.