Almost every animal that has ever lived on earth fits into one of eight basic body plans. This series studies each of these phyla and the animals built on them. The large, diverse phylum Arthropoda - curstaceans, spiders, millipedes, centipedes and insec ts - fills the fifth segment of the series. Then the soft-bodied snails, slugs, clams, squid, nautilus and octopus of phylum mollusca are investigated in the sixth episode. DVD includes English and Spanish audio tracks. Narrator Peter Coyote. Brief serie s study guide available.