Box jellyfish are responsible for about 20 to 40 deaths in the Philippines each year. The sting of one species of box jellyfish can kill a person in 3 minutes! While these are some of the deadliest jellyfish, all species of jellyfish sting, both for defense and to hunt for food. Full-color photographs introduce readers to the growing population of jellyfish in Earth's oceans. From the strange-but-cool life cycle of the jellyfish to the specifics of their stinging tentacles, the main text includes interesting science content, astonishing fact boxes, and safety information about sharing the oceans with these stinging creatures.