Audience: Students; Grades: 9-12; Science.In Hawaii, marine biologist, Gail Kaalialii, studies a variety of echinoderms explaining how echinodern symmetry and body design have enabled these brainless animals to survive and flouish. In the second segment, Don Wobber, a retired sculptor, shows his underwater films that capture sea stars' fight for dominance. Other close-up photography and computer animation demonstrate their hydraulically powered tube feet. A third segment films how sea stars attack mussels with these tube feet and externalize their stomachs to feed. The aggressive, twenty-armed Pycnopodia is filmed as it captures snails and other prey. A final segment follows paleontologist Andrew Smith as gathers fossil evidence that echinoderms evolved a sedimentary, plant-like life that resulted in the great diversity of echinoderms found today. For Teacher's Guides go to: https://drive.google.com/folderview?id=0B9ZT7PYcIjLffk5QOEpyUGs2NnQ3cjRETGlnZHB3RjN3VkRrSC1wZWxUQ3pwWGFxRV9lYlU&usp=sharing