Audience: Students; Grades: 9-12; Science. (2003) Biologist John "Jack" Costello explains how cnidarians, the first tentacled animals, were also the first to develop nerves and muscles that allowed them to move, find food, and protect themselves from enemies. Close-up photography of sea aenmones and corals reveal complex behaviors that might be expected of higher level animals. Costello also reviews his studies of jellyfish movement that enabled this cnidarian to become a predatory killer. In Monterey Bay, marine biologist, Bruce Robison travels in an underwater capsule called an R-O-V to discover a new species of giant jellyfish. For Teacher's Guides go to: https://drive.google.com/folderview?id=0B9ZT7PYcIjLffk5QOEpyUGs2NnQ3cjRETGlnZHB3RjN3VkRrSC1wZWxUQ3pwWGFxRV9lYlU&usp=sharing