This 23-minute videotape for grades 5-8, presents the myriad of animal life that exists on the planet. Students can view and perform experiments and investigations that help explain animal traits and habits. No organism on Earth can exist independently. Students find out more about animal relationships such as predator/prey relationships and symbiotic host/parasitic relationships, and learn how animals are dependent on each other for survival through the food chain. A hands-on experiment is featured in which students observe a symbiotic relationship between two fish, while a visit to Thailand's Srirachi Tiger Zoo profiles a uniquely structured interdependency that is helping to rejuvenate the population of Bengal Tigers. This program is based on the concepts outlined in the National Science Education Standards for Life Science: (1) structure and function in living systems; (2) reproduction and heredity; (3) regulation and behavior; (4) populations and ecosystems; and (5) diversity and adaptations of organisms. A teacher's guide is also included. (ASK)