Sharks have lived in Earth’s oceans for millions of years, but today many species are at risk. This hi‑lo book explores how sharks’ flexible skeletons, powerful fins, sharp senses, and specialized teeth help them survive as top predators. Readers learn how sharks hunt, why they grow slowly, and how their low number of pups makes recovery difficult. The book also explains the dangers sharks face from overfishing, pollution, and habitat loss—and why healthy oceans depend on them. Clear text, vivid visuals, and critical‑thinking questions help developing readers understand why sharks matter and how conservationists are fighting to save them.