Dive In and explore the depths and mysteries of the ocean. Learn about the ocean zones and the marine life within An ideal introduction for early readers to the sunlit zone, the twilight zone, and the midnight zone. Find out what it takes for marine plants and animals to survive in each zone. Other science concepts included in Dive In are: adaptation photosynthesis camouflage overfishing bioluminescence hydrothermal vents taking care of the oceans