A California sea lion shoots above the ocean's surface. Suddenly there is another, and then a third one racing through the water. The sea lions are speeding toward one of their favorite places to dive for clams. Then things get scary. A gigantic great white shark bursts out of the water. The sea lions' hunting trip has just turned into a race for their lives! Young readers will explore the underwater world of these beautiful marine mammals through clear text, full-color photos, and diagrams. Age-appropriate activities, such as researching how California sea lions compare to other pinnipeds, give readers a chance to make observations and to develop animal-science skills.