"龟鳖目" (Testudines) is an order of reptiles that includes turtles and tortoises. These animals are characterized by their bony or cartilaginous shell, which protects them from predators. They are found in various habitats, including oceans, rivers, and land. Turtles are generally aquatic, while tortoises are terrestrial. Both groups are known for their slow movement and long lifespan. They play important roles in their ecosystems, such as controlling aquatic vegetation and serving as prey for larger animals. Conservation efforts are crucial for many species within this order, as they face threats from habitat loss and pollution.