Jellyfish

What animal has a jellylike body, long tentacles, and the power to stop a person's heart? It's the jellyfish, and these adaptations have helped it survived over hundreds of millions of years. Readers will learn all about these living fossils-from their life cycle to their habitats-and how those traits and everything in between have changed little over the course of time. Age-appropriate text and bright images of fossils and living jellyfish give readers a sense of this animal's ancientness. A glossary, index, and websites provide opportunities for additional learning.