Seals and sea lions are both sleek, fast swimmers and are known for forming large, noisy groups on land. At first glance, these animals look similar, but readers will enjoy exploring some of the ways to tell them apart. Full-color photographs highlight the concepts in the text and a comparison chart provides a handy visual tool for taking a closer look at how seals and sea lions measure up against one another. By the end of the book, readers will be experts on these furry, fun marine mammals.