15 minutes

The phylum Mollusca is filled with wonderfully adapted soft-bodied creatures that make up four major classes. Class Polyplacophora (with detailed observations on chitons), Class Gastropoda (snails, limpets, nudibranchs, and slugs), Class Pelecypoda (clams and mussels), and Class Cephalopoda (squid and octopus). In each group the emphasis is on: structure, behaviour, larval development, and the kinds of adaptations that allow these amazing creatures to live in virtually all aquatic habitats. (2006)