This documentary examines the various economic, environmental, social, and political issues surrounding fish farming on the B.C. coast. This look at aquaculture deals with the impact of fish farming on natural salmon populations and ecological systems, the concerns of waterfront property owners, pollution from chemicals contained in the feed, foreign ownership of a resource industry, and the threat to traditional fisheries. Useful for discussions in geography, social and environmental studies, ecology, natural resources, biology, genetics, consumer education, and business education. Also available in an abridged version, Changing Tides.