Laboratory exercises: asking questions; some physical and chemical properties of seawater; taxonomic classification and identification; phytoplankton; attached marine plants; photosynthetic pigments of marine plants; marine bacteria; some lower marine invertebrates; marine mollusc; marine arthropods; echinoderms; marine zooplankton; cartilaginous fishes; bony fishes; adaptations of marine mammals. Field studies: general information; coastal wetlands; rocky intertidal; fouling community; aquarium studies of marine vertebrates. Appendices: the metric system; the microscope; permanent plant collections; the gram stain; analyzing data; some regional field and identification guides for marine organisms.